The BRIT Awards 2011 - Show

LONDON, ENGLAND - FEBRUARY 15: Rihanna performs live onstage at The Brit Awards 2011 held at The O2 Arena on February 15, 2011 in London, England. (Photo by Dave J Hogan/Getty Images)

Rihanna And Ke$ha In Concert

NEW YORK - AUGUST 12: Singer Rihanna performs at Madison Square Garden on August 12, 2010 in New York City. (Photo by Bryan Bedder/Getty Images)

Rock In Rio Madrid - Day 2

ARGANDA DEL REY, SPAIN - JUNE 05: Singer Rihanna performs on stage during Rock in Rio Madrid Festival on June 5, 2010 in Arganda del Rey, Spain. (Photo by Carlos Alvarez/Getty Images)

Rihanna In Concert At Mandalay Bay In Las Vegas

LAS VEGAS - JULY 17: Recording artist Rihanna performs at the Mandalay Bay Events Center during her Last Girl On Earth tour July 17, 2010 in Las Vegas, Nevada. Rihanna is touring in support of the album, "Rated R." (Photo by Ethan Miller/Getty Images)

2010 MTV Video Music Awards - Show

LOS ANGELES, CA - SEPTEMBER 12: Singer Rihanna performs onstage during the 2010 MTV Video Music Awards at NOKIA Theatre L.A. LIVE on September 12, 2010 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

Rihanna Turns On The Westfield Christmas Lights

LONDON, ENGLAND - NOVEMBER 04: Rihanna turns on the Westfield Shopping Centre Christmas lights on November 4, 2010 in London, England. (Photo by Gareth Cattermole/Getty Images)

MTV Europe Music Awards 2010 - Show

MADRID, SPAIN - NOVEMBER 07: Rihanna performs during the MTV Europe Music Awards 2010 live show at La Caja Magica on November 7, 2010 in Madrid, Spain. (Photo by Gareth Cattermole/Getty Images)

Rihanna Visits MTV's "The Seven" - November 15, 2010

NEW YORK - NOVEMBER 15: Singer Rihanna performs on MTV's "The Seven" in Times Square on November 15, 2010 in New York City. (Photo by Bryan Bedder/Getty Images)

Rihanna Visits MTV's "The Seven" - November 15, 2010

NEW YORK - NOVEMBER 15: Singer Rihanna performs on MTV's "The Seven" in Times Square on November 15, 2010 in New York City. (Photo by Bryan Bedder/Getty Images)

2010 American Music Awards - Show

LOS ANGELES, CA - NOVEMBER 21: Singer Rihanna onstage during the 2010 American Music Awards held at Nokia Theatre L.A. Live on November 21, 2010 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images for DCP)

The 53rd Annual GRAMMY Awards - Show

LOS ANGELES, CA - FEBRUARY 13: Rihanna 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 BRIT Awards 2011 - Show

LONDON, ENGLAND - FEBRUARY 15: (UK TABLOID NEWSPAPERS OUT) Rihanna performs live onstage at The Brit Awards 2011 held at The O2 Arena on February 15, 2011 in London, England. (Photo by Dave Hogan/Getty Images)

The BRIT Awards 2011 - Show

LONDON, ENGLAND - FEBRUARY 15: (UK TABLOID NEWSPAPERS OUT) Rihanna performs on stage at the The BRIT Awards 2011 at O2 Arena on February 15, 2011 in London, England. (Photo by Dave Hogan/Getty Images)

The BRIT Awards 2011 - Show

LONDON, ENGLAND - FEBRUARY 15: (UK TABLOID NEWSPAPERS OUT) Rihanna performs live onstage at The Brit Awards 2011 held at The O2 Arena on February 15, 2011 in London, England. (Photo by Dave Hogan/Getty Images)

The BRIT Awards 2011 - Show

LONDON, ENGLAND - FEBRUARY 15: (UK TABLOID NEWSPAPERS OUT) Rihanna performs line onstage at The Brit Awards 2011 held at The O2 Arena on February 15, 2011 in London, England. (Photo by Dave Hogan/Getty Images)

Rihanna Celebrates The Launch Of "Reb'l Fleur" At Macy's Lakewood Mall

LAKEWOOD, CA - FEBRUARY 18: Recording artist Rihanna attends the launch of "Reb'l Fleur" at Macy's Lakewood Mall on February 18, 2011 in Lakewood, California. (Photo by Frederick M. Brown/Getty Images)

2011 NBA All-Star Game - Performances And Celebrities

LOS ANGELES, CA - FEBRUARY 20: Singer Rihanna performs during the 2011 NBA All-Star game halftime show at Staples Center on February 20, 2011 in Los Angeles, California. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Kevork Djansezian/Getty Images)

2011 NBA All-Star Game - Performances And Celebrities

LOS ANGELES, CA - FEBRUARY 20: Singer Rihanna performs during the 2011 NBA All-Star game halftime show at Staples Center on February 20, 2011 in Los Angeles, California. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Kevork Djansezian/Getty Images)

2011 NBA All-Star Game - Performances And Celebrities

LOS ANGELES, CA - FEBRUARY 20: Singer Rihanna sits in the audience during the 2011 NBA All-Star game at Staples Center on February 20, 2011 in Los Angeles, California. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Kevork Djansezian/Getty Images)

2011 NBA All-Star Game - Performances And Celebrities

LOS ANGELES, CA - FEBRUARY 20: Singer Rihanna performs during the 2011 NBA All-Star game halftime show at Staples Center on February 20, 2011 in Los Angeles, California. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Jason Merritt/Getty Images)

Coachella Valley Music & Arts Festival 2011 - Day 2

INDIO, CA - APRIL 16: Singer Rihanna in the audience during Day 2 of the Coachella Valley Music & Arts Festival 2011 held at the Empire Polo Club on April 16, 2011 in Indio, California. (Photo by Christopher Polk/Getty Images)

Katharina Harf Hosts DKMS' 5th Annual Gala: Linked Against Leukemia Honoring Rihanna & Michael Clinton At Cipriani Wall Street

NEW YORK, NY - APRIL 28: Singer Rihanna attends the DKMS' 5th Annual Gala: Linked Against Leukemia honoring Rihanna & Michael Clinton hosted by Katharina Harf at Cipriani Wall Street on April 28, 2011 in New York City. (Photo by Andrew H. Walker/Getty Images for DKMS)

"Alexander McQueen: Savage Beauty" Costume Institute Gala At The Metropolitan Museum Of Art - Arrivals

NEW YORK, NY - MAY 02: Rihanna attends the "Alexander McQueen: Savage Beauty" Costume Institute Gala at The Metropolitan Museum of Art on May 2, 2011 in New York City. (Photo by Stephen Lovekin/Getty Images)

Nivea And Rihanna Celebrating 100 Years Of Skincare

MILAN, ITALY - MAY 05: Singer Rihanna performs at the Nivea 100th anniversary celebration on May 5, 2011 in Milan, Italy. (Photo by Vittorio Zunino Celotto/Getty Images)

2011 Billboard Music Awards - Show

LAS VEGAS, NV - MAY 22: Singer Rihanna performs during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images for ABC)

Rihanna Performs On NBC's "Today" - May 27, 2011

NEW YORK, NY - MAY 27: Singer Rihanna performs on NBC's "Today" in Rockefeller Plaza on May 27, 2011 in New York City. (Photo by Mike Coppola/Getty Images)