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South Korean rapper Psy performs "Gentleman" during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Lee Jae-Won ( PSY-SONG/GENTLEMAN )

South Korean rapper Psy (top) performs during his concert "Happening" in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Kim Hong-Ji ( PSY-SONG/GENTLEMAN )

South Korean rapper PSY performs at his concert "Happening" in Seoul, South Korea Saturday, April 13, 2013. (AP Photo/Kin Cheung) ( SKorea PSY's New Single )

A fan of South Korean rapper PSY attends the concert "Happening" in Seoul, South Korea Saturday, April 13, 2013. South Korean pop star PSY's first new single since his viral hit "Gangnam Style" is stealing attention from inter-Korean tensions. (AP Photo/Kin Cheung) ( SKorea PSY's New Single )

South Korean rapper Psy performs "Gentleman" during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Lee Jae-Won ( PSY-SONG/GENTLEMAN )

A South Korean dance team performs during a flashmob to celebrate Psy's new song "Gentleman" at the Seoul World Cup stadium, the venue for Psy's concert "happening" in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Kim Hong-Ji ( PSY-SONG/GENTLEMAN )

Children wearing a mask of South Korean rapper Psy play at the Seoul World Cup stadium, the venue for Psy's concert "happening" in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Kim Hong-Ji ( PSY-SONG/GENTLEMAN )

Fans of South Korean rapper Psy hold up their concert tickets as they wait in line at the Seoul World Cup stadium, the venue for Psy's concert "happening" in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Kim Hong-Ji (SOUTH KOREA - Tags: ENTERTAINMENT) ( PSY-SONG/GENTLEMAN )

A baby looks at a mask of South Korean rapper Psy at the Seoul World Cup stadium, where is venue for the Psy's concert "happening" in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Kim Hong-Ji ( PSY-SONG/GENTLEMAN )

A South Korean dance team performs Psy's "Gangnam Style" horseriding dance during a flashmob to celebrate Psy's new song "Gentleman" at the Seoul World Cup stadium, the venue for Psy's concert "happening" in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Kim Hong-Ji ( PSY-SONG/GENTLEMAN )

SEOUL, SOUTH KOREA - APRIL 13: Singer PSY attends a press conference before his concert to introduce his new single 'Gentleman' at Olympic Stadium on April 13, 2013 in Seoul, South Korea. (Photo by Chung Sung-Jun/Getty Images) ( 166472612 )

South Korean rapper Psy and Talent Manager Scooter Braun (L) react during a news conference before Psy's concert in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Lee Jae-Won ( PSY-SONG/GENTLEMAN )

South Korean rapper Psy poses during a news conference before his concert in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Lee Jae-Won ( PSY-SONG/GENTLEMAN )

K-pop singer G-Dragon performs as a guest during Psy's concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at the concert at Seoul's World Cup stadium. REUTERS/Lee Jae-Won ( PSY-SONG/GENTLEMAN )

K-pop girl group 2NE1 performs as a guest during Psy's concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at the concert at Seoul's World Cup stadium. REUTERS/Lee Jae-Won ( PSY-SONG/GENTLEMAN )

South Korean rapper Psy performs during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at the concert at Seoul's World Cup stadium. REUTERS/Lee Jae-Won ( PSY-SONG/GENTLEMAN )

South Korean rapper PSY performs at his concert "Happening" in Seoul, South Korea Saturday, April 13, 2013. (AP Photo/Kin Cheung) ( SKorea PSY's New Single )

South Korean rapper Psy performs during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at the concert at Seoul's World Cup stadium. REUTERS/Lee Jae-Won ( PSY-SONG/GENTLEMAN )

South Korean rapper PSY, in a checkered jacket, performs his new song "Gentleman" in his concert titled "Happening" in Seoul, South Korea Saturday, April 13, 2013. PSY's first new single since his megahit "Gangnam Style" was released in 119 countries on Friday, his agency said. (AP Photo/Kin Cheung) ( South Korea PSY )

South Korean rapper PSY, in a checkered jacket, performs his new song "Gentleman" in his concert titled "Happening" in Seoul, South Korea Saturday, April 13, 2013. PSY's first new single since his megahit "Gangnam Style" was released in 119 countries on Friday, his agency said. (AP Photo/Kin Cheung) ( APTOPIX South Korea PSY )

South Korean rapper PSY performs at his concert "Happening" in Seoul, South Korea Saturday, April 13, 2013. (AP Photo/Kin Cheung) ( SKorea PSY's New Single )

SEOUL, SOUTH KOREA - APRIL 13: Singer PSY performs his new single 'Gentleman' in concert titled "Happening" at Olympic Stadium on April 13, 2013 in Seoul, South Korea. (Photo by Chung Sung-Jun/Getty Images) ( 166500620 )

South Korean rapper Psy performs "Gentleman" during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Lee Jae-Won ( PSY-SONG/GENTLEMAN )

South Korean rapper Psy performs during his concert "Happening" in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Kim Hong-Ji ( PSY-SONG/GENTLEMAN )

South Korean rapper Psy (C) performs during his concert "Happening" in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Lee Jae-Won ( PSY-SONG/GENTLEMAN )

South Korean rapper PSY, in a checkered jacket, performs his new song "Gentleman" in his concert titled "Happening" in Seoul, South Korea Saturday, April 13, 2013. PSY's first new single since his megahit "Gangnam Style" was released in 119 countries on Friday, his agency said. (AP Photo/Kin Cheung) ( South Korea PSY )

South Korean rapper Psy performs "Gentleman" during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Lee Jae-Won ( PSY-SONG/GENTLEMAN )

South Korean rapper PSY smiles during a news conference for his concert "Happening" in Seoul, South Korea Saturday, April 13, 2013. PSY is unveiling the music video and choreography for his new single "Gentleman" at the Seoul concert. (AP Photo/Kin Cheung) ( South Korea PSY )