Singer Rihanna performs with Drake

(Photo credit MARK RALSTON/AFP/Getty Images)

Singer Rihanna performs with Drake onstage during the Grammy Awards Show at the Staples Center in Los Angeles on February 13, 2011. Mick Jagger, Bob Dylan and Barbra Streisand joined rising stars and seasoned chart-toppers at the music industry's annual Grammys awards bash. Lady Gaga, Katy Perry and teen sensation Justin Bieber were also on a star-studded roster of performers at the show in Los Angeles. The Grammys are the music industry's equivalent of the Oscars, the climax of Hollywood's annual awards season that this year takes place in barely two weeks' time, on February 27. AFP PHOTO / Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)

Singer Pink performs at the 52nd Grammy

(credit: Robyn Beck/AFP/Getty Images)

Singer Pink performs at the 52nd Grammy Awards in Los Angeles on January 31, 2010. AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

British musician and former Beatle Paul McCartney

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British musician and former Beatle Paul McCartney performs during the 51st annual Grammy awards held at the Staples Center in Los Angeles on February 8, 2009. AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

The 53rd Annual GRAMMY Awards - Show

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LOS ANGELES, CA - FEBRUARY 13: (L-R) Musicians Ben Lovett, Marcus Mumford, Winston Marshall, and Ted Dwane of Mumford and Sons perform onstage during The 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

Miley Cyrus (L) and Taylor Swift (R)

(Photo credit ROBYN BECK/AFP/Getty Images)

Miley Cyrus (L) and Taylor Swift (R) perform during the 51st annual Grammy awards held at the Staples Center in Los Angeles on February 8, 2009. AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

The 53rd Annual GRAMMY Awards - Show

(Photo by Kevin Winter/Getty Images)

LOS ANGELES, CA - FEBRUARY 13: Singer Mick Jagger performs onstage during the 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

The 53rd Annual GRAMMY Awards - Show

(Photo by Kevin Winter/Getty Images)

LOS ANGELES, CA - FEBRUARY 13: Singer Lady Gaga performs onstage during the 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

Nominee for Album of the Year Kanye West

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Nominee for Album of the Year Kanye West performs at the 50th Grammy Awards in Los Angeles on February 10, 2008. AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

Singer Katy Perry performs onstage

(Photo credit MARK RALSTON/AFP/Getty Images)

Singer Katy Perry performs onstage during the GRAMMY Awards Show at the Staples Center in Los Angeles on February 13, 2011. Mick Jagger, Bob Dylan and Barbra Streisand joined rising stars and seasoned chart-toppers at the music industry's annual Grammys awards bash. Lady Gaga, Katy Perry and teen sensation Justin Bieber were also on a star-studded roster of performers at the show in Los Angeles, where rapper Eminem hopes to seal a comeback year with a brace of awards. The Grammys are the music industry's equivalent of the Oscars, the climax of Hollywood's annual awards season that this year takes place in barely two weeks' time, on February 27. AFP PHOTO / Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)

Justin Timberlake sings with Al Green

(Photo credit ROBYN BECK/AFP/Getty Images)

Justin Timberlake sings with Al Green during the 51st annual Grammy awards held at the Staples Center in Los Angeles on February 8, 2009. AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

US singer Jennifer Hudson performs

(Photo credit ROBYN BECK/AFP/Getty Images)

US singer Jennifer Hudson performs during the 51st annual Grammy awards held at the Staples Center in Los Angeles on February 8, 2009. AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

The 53rd Annual GRAMMY Awards - Show

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LOS ANGELES, CA - FEBRUARY 13: Singers Jaden Smith (L) and Justin Bieber perform onstage during the 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

The 52nd Annual GRAMMY Awards - Show

(Photo by Kevin Winter/Getty Images)

LOS ANGELES, CA - JANUARY 31: Musicians Billie Joe Armstrong (L) and Mike Dirnt of Green Day perform onstage during the 52nd Annual GRAMMY Awards held at Staples Center on January 31, 2010 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

The 53rd Annual GRAMMY Awards - Show

(Photo by Kevin Winter/Getty Images)

LOS ANGELES, CA - FEBRUARY 13: (L-R) Singers Jennifer Hudson and Florence Welch perform onstage during The 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

The 52nd Annual GRAMMY Awards - Show

(Photo by Kevin Winter/Getty Images)

LOS ANGELES, CA - JANUARY 31: Singers Fergie (L) and will.i.am of the Black Eyed Peas perform onstage during the 52nd Annual GRAMMY Awards held at Staples Center on January 31, 2010 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

Rap star Eminem performs onstage

(Photo credit MARK RALSTON/AFP/Getty Images)

Rap star Eminem performs onstage during the GRAMMY Awards Show at the Staples Center in Los Angeles on February 13, 2011. Mick Jagger, Bob Dylan and Barbra Streisand joined rising stars and seasoned chart-toppers at the music industry's annual Grammys awards bash. Lady Gaga, Katy Perry and teen sensation Justin Bieber were also on a star-studded roster of performers at the show in Los Angeles, where rapper Eminem hopes to seal a comeback year with a brace of awards. The Grammys are the music industry's equivalent of the Oscars, the climax of Hollywood's annual awards season that this year takes place in barely two weeks' time, on February 27. AFP PHOTO / Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)

Musicians Elton John (L) and Lady Gaga

(Photo credit ROBYN BECK/AFP/Getty Images)

Musicians Elton John (L) and Lady Gaga perform at the 52nd Grammy Awards in Los Angeles on January 31, 2010. AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

Chris Martin and his band Coldplay

(Photo credit ROBYN BECK/AFP/Getty Images)

Chris Martin and his band Coldplay perform during the 51st annual Grammy awards held at the Staples Center in Los Angeles on February 8, 2009. AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

The 53rd Annual GRAMMY Awards - Show

Photo by Kevin Winter/Getty Images)

LOS ANGELES, CA - FEBRUARY 13: Singer Bob Dylan performs onstage during the 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

Singer Tina Turner (R) performs

(Photo credit ROBYN BECK/AFP/Getty Images)

Singer Tina Turner (R) performs with Nominee for Record Of The Year Beyonce (L) at the 50th Grammy Awards in Los Angeles on February 10, 2008. AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

The 53rd Annual GRAMMY Awards - Show

(Photo by Kevin Winter/Getty Images)

LOS ANGELES, CA - FEBRUARY 13: The Avett Brothers perform onstage during The 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)