Bruno Mars performs at the Staples Cente

Bruno Mars performs at the Staples Center during the 54th Grammy Awards in Los Angeles, California, February 12, 2012. AFP PHOTO Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

US singer-songwriter Bruno Mars accepts

US singer-songwriter Bruno Mars accepts the International Male Solo Artist award at the BRIT Awards 2012 in London on February 21, 2012. (Photo credit should read LEON NEAL/AFP/Getty Images)

US singer Bruno Mars performs live on st

US singer Bruno Mars performs live on stage during the BRIT Awards 2012 in London on February 21, 2012. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)

2012 Concert For The Rainforest Fund - Show

<> at Carnegie Hall on April 3, 2012 in New York City.

2012 Concert For The Rainforest Fund - Show

<> at Carnegie Hall on April 3, 2012 in New York City.

"Schiaparelli And Prada: Impossible Conversations" Costume Institute Gala

attends the "Schiaparelli And Prada: Impossible Conversations" Costume Institute Gala at the Metropolitan Museum of Art on May 7, 2012 in New York City.

"Schiaparelli And Prada: Impossible Conversations" Costume Institute Gala

attends the "Schiaparelli And Prada: Impossible Conversations" Costume Institute Gala at the Metropolitan Museum of Art on May 7, 2012 in New York City.

Bruno Mars performs at the Staples Cente

Bruno Mars performs at the Staples Center during the 54th Grammy Awards in Los Angeles, California, February 12, 2012. AFP PHOTO Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)