Celebrities Watch Floyd Mayweather Defeat Saul �Canelo� Alvarez (VIDEO)

The main attraction Saturday night for Hollywood, sports and music stars was the Fight of the Decade/Fight of the Century between Floyd �Money� Mayweather Jr. of Las Vegas and Saul �Canelo� Alvarez of Guadalajara, Mexico, at MGM Grand Garden Arena after a big weeklong buildup. Even pop superstar Justin Bieber was in the ring with Mayweather Jr. again. The long list of celebrities walking a red carpet before the fight and/or attending the fight included Charles Barkley, Peter Berg, Josh Bowman, Jerry Bruckheimer, Busta Rhymes, Lizzy Caplan, Gina Carano, Don Cheadle, Sean �Diddy� Combs, Kevin Garnett, Ashley Greene, Pooch Hall, Calvin Harris, Kevin Hart, Liam Hemsworth (minus fiancee Miley Cyrus), Earvin �Magic� Johnson Jr., Joe Jonas, Kevin Jonas, Nick Jonas (also in town to celebrate his 21st birthday tonight at XS in Steve Wynn�s Encore), Heidi Klum, David Lee and Lil Wayne. Also, LL Cool J, George Lopez, William H. Macy, Ben McKenzie, Dash Mihok, Nas (also in town to celebrate his 40th birthday), Jack Nicholson, Rosie Perez, Michael Phelps, Paul Pierce, Ray J., Jalen Rose, Rick Ross, Garry Shandling, Michael Strahan, Glynn Turman, 2 Chainz, Tyga, Emily VanCamp, Cain Velasquez, Jon Voight, Denzel Washington, Paul Wesley and Owen Wilson. Mayweather Jr. defeated Alvarez by decision after 12 rounds, keeping his victory streak at 45 and winning more than $40 million(!), while Alvarez suffered his first loss; his record is now 42-1-1.