NBA basketball All-Star Game

Rapper Jay-Z (R) and singer Beyonce Knowles attend the NBA All-Star basketball game in Los Angeles. (Reuters/Danny Moloshok)

L.A.Clipper girls perform during the All-Stars Slam Dunk contest at the Staples Center in Los Angeles on February 19, 2011.  (AFP/Mark Ralston)

TV personality Lala Vazquez and NBA player Carmelo Anthony arrive to the National Basketball Players Association (NBPA) All-Star Gala on February 19, 2011 in Los Angeles, California.  (AFP/Alberto E. Rodriguez)

Actor Mark Wahlberg with sons Michael and Brendan attend NBA All-Star Saturday night presented by State Farm at Staples Center on February 19, 2011 in Los Angeles, California.  (AFP)

Maria Shriver, Christopher Schwarzenegger, and Shaquille O'Neal of the Boston Celtics attend NBA All-Star Saturday night presented by State Farm at Staples Center on February 19, 2011 in Los Angeles, California.  (AFP)

Singer John Legend and his girlfriend model Chrissy Teigen (L) attend the NBA All-Star basketball game in Los Angeles February 20, 2011.  (Reuters)

Carmelo Anthony arrives at the NBA basketball All-Star Game in Los Angeles on February 20, 2011.  (AP/Matt Sayles)

Los Angeles Clippers' Blake Griffin arrives at the NBA basketball All-Star Game in Los Angeles on February 20, 2011.  (AP)

Boston Celtics' Kevin Garnett, Rajon Rondo, Paul Pierce and Ray Allen arrive at the NBA basketball All-Star Game in Los Angeles on February 20, 2011.  (AP)

Actress Stacey Keibler arrives at the NBA basketball All-Star Game in Los Angeles on February 20, 2011.  (AP)

Actress Gabrielle Union arrives at the NBA basketball All-Star Game in Los Angeles on February 20, 2011.  (AP)

Head coach Doc Rivers of the Boston Celtics and the Eastern Conference is introduced before the 2011 NBA All-Star Game at Staples Center on February 20, 2011 in Los Angeles, California.  (AFP)

Singer Lenny Kravitz performs during player introductions before the start of the NBA All-Star basketball game in Los Angeles, February 20, 2011. REUTERS/Danny Moloshok  (Reuters)

Rappers Lil Wayne (L) and Sean 'P. Diddy' Combs greet each other at the NBA All-Star basketball game in Los Angeles, February 20, 2011. REUTERS/Lucy Nicholson (Reuters)

Gene Simmons (L) of the rock band 'Kiss' and actor and former California Governor Arnold Schwarzenegger attend the NBA All-Star basketball game in Los Angeles, February 20, 2011.  (Reuters)

East All Star Dwyane Wade of the Miami Heat is introduced before the NBA All-Star basketball game in Los Angeles, February 20, 2011.  (Reuters)

Singer Justin Bieber (R) sits in the front row during the NBA All-Star basketball game in Los Angeles February 20, 2011.  (Reuters)

Canadian singer Justin Bieber throws the ball back to the referees during the NBA All-Star basketball game in Los Angeles February 20, 2011. (Reuters)

Actor Dustin Hoffman (L) and his son Jake attend the NBA All-Star basketball game in Los Angeles, February 20, 2011. REUTERS/Lucy Nicholson (Reuters)

Gene Simmons (L) of the rock band 'Kiss' and actor and former California Governor Arnold Schwarzenegger attend the NBA All-Star basketball game in Los Angeles, February 20, 2011.  (Reuters)

Rappers Lil Wayne (L) and Sean 'P. Diddy' Combs greet each other at the NBA All-Star basketball game in Los Angeles, February 20, 2011.  (Reuters)

Singer John Legend and his girlfriend model Chrissy Teigen (L) attend the NBA All-Star basketball game in Los Angeles. (Reuters)

Singer Beyonce Knowles sits courtside while attending the NBA All-Star basketball game in Los Angeles, February 20, 2011. (Reuters)

Singer Keri Hilson sits courtside during the NBA All-Star basketball game in Los Angeles, February 20, 2011. REUTERS/Danny Moloshok (Reuters)

Gene Simmons of the rock band 'Kiss' attends the NBA All-Star basketball game in Los Angeles, February 20, 2011.  (Reuters)

Actor Dustin Hoffman (L) photographs actress LaLa Vasquez at the T-Mobile Magenta Carpet pre NBA All-Star Game event in Los Angeles, February 20, 2011.  (Reuters)

Musician Steven Tyler arrives at the T-Mobile Magenta Carpet pre NBA All-Star Game event in Los Angeles on February 20, 2011.  (Reuters)

Musician John Legend (R) and girlfriend Christine Teigen arrive at the T-Mobile Magenta Carpet pre NBA All-Star Game event in Los Angeles on February 20, 2011.  (Reuters)

Actor Zachary Levi arrives at the T-Mobile Magenta Carpet pre NBA All-Star Game event in Los Angeles on February 20, 2011.  (Reuters)

Actress Ellen Pompeo (R) and her husband record producer Chris Ivery arrive at the T-Mobile Magenta Carpet pre NBA All-Star Game event in Los Angeles on February 20, 2011.  (Reuters)

Musician Ciara arrives at the T-Mobile Magenta Carpet pre NBA All-Star Game event in Los Angeles February 20, 2011. (Reuters)

Singer Rihanna performs during half-time of the NBA All-Star basketball game in Los Angeles, February 20, 2011. (Reuters)

Singer Rihanna (R) performs with Canadian rapper Drake during half-time of the NBA All-Star basketball game in Los Angeles February 20, 2011.  (Reuters)

Singer Rihanna performs during half-time of the NBA All-Star basketball game in Los Angeles, February 20, 2011.  (Reuters)

Beyonce watches during the second half of the NBA basketball All-Star Game on Sunday, Feb. 20, 2011, in Los Angeles.  (AP)

Singers Rihanna (L) and Kanye West perform during half-time of the NBA All-Star basketball game in Los Angeles, February 20, 2011.  (Reuters)

Singer Rihanna (L) performs with Canadian rapper Drake during half-time of the NBA All-Star basketball game in Los Angeles, February 20, 2011.  (Reuters)

Singers Rihanna (L) and Kanye West perform during half-time of the NBA All-Star basketball game in Los Angeles, February 20, 2011.  (Reuters)

Canadian singer Justin Bieber sits courtside during the NBA All-Star basketball game in Los Angeles February 20, 2011.  (Reuters)

Singer Rihanna performs during half-time of the NBA All-Star basketball game in Los Angeles, February 20, 2011.  (Reuters)

Canadian Singer Justin Bieber (L) and singer-songwriter Lenny Kravitz attend the NBA All-Star basketball game in Los Angeles February 20, 2011.  (Reuters)

Rihanna performs in the half time show at the NBA All-Star Game February 20, 2011, part of NBA All-Star Weekend at Staples Center in Los Angeles, California.  (AFP)

Singer Stevie Wonder sits courtside during the NBA All-Star basketball game in Los Angeles February 20, 2011.  (Reuters)

Rihanna performs in the half time show at the NBA All-Star Game February 20, 2011, part of NBA All-Star Weekend at Staples Center. (AP)

Rihanna and Kayne West perform in the half time show at the NBA All-Star Game February 20, 2011, part of NBA All-Star Weekend at Staples Center in Los Angeles, California.  (AFP)

Rihanna performs in the half time show at the NBA All-Star Game February 20, 2011, part of NBA All-Star Weekend at Staples Center in Los Angeles, California. AFP PHOTO / Robyn Beck  (AFP)

Rihanna performs in the half time show at the NBA All-Star Game February 20, 2011, part of NBA All-Star Weekend at Staples Center in Los Angeles, California. AFP PHOTO / Robyn Beck  (AFP)

Rihanna performs in the half time show at the NBA All-Star Game February 20, 2011, part of NBA All-Star Weekend at Staples Center in Los Angeles, California.  (AP)

Rihanna performs in the half time show at the NBA All-Star Game February 20, 2011, part of NBA All-Star Weekend at Staples Center in Los Angeles, California.  (AFP)

Justin Bieber talks to Rihanna during the second half of the NBA basketball All-Star Game on Sunday, Feb. 20, 2011, in Los Angeles.  (AP)

Rihanna watches during the second half of the NBA basketball All-Star Game on Sunday, Feb. 20, 2011, in Los Angeles. (AP)