Not everyone gets to sing along on stage with rapper Rick Ross at their 30th birthday party, but it was just another night in Miami Beach for Heat star Dwyane Wade.

Wade celebrated his 30th birthday at the Setai hotel along with a who’s-who of rappers and celebrities. LeBron James, Udonis Haslem, Wade and Rick Ross had some fun on stage before Wade cut into his huge birthday cake. Kelly Rowland and Wade’s girlfriend Gabrielle Union looked on with Udonis Haslem and LeBron James.

Some of the other celebrities in attendance included: rapper Fat Joe, DJ Irie, Flo Rida, T.I. and wife Tameka ‘Tiny’ Cottle, Common, and Tracy Mourning. Teammates Chris Bosh and Mario Chalmers were also there to celebrate.

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Pop star Rihanna was at Staples Center last night, sitting court-side with her assistant as the Los Angeles Lakers played the Memphis Grizzlies.

Rihanna was wearing an American flag t-shirt with a pair of super-short shorts and sky-high Louboutins. Her court-side appearance didn’t distract the Lakers, who beat the Grizzlies. Matt Barnes, who is single after announcing his split from Basketball Wives star Gloria Govan in October, tweeted after their win, “@Rihanna thx for coming to the game 2nite, u MIGHT be good luck!!! Hahaa”

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The face of women’s MMA, Gina Carano, was spotted on the red carpet last night at the premiere of the upcoming Steven Soderbergh movie Haywire. Carano stopped for a photo with her co-star, Channing Tatum, at the Director’s Guild in Los Angeles.

The film also stars Antonio Banderas, Ewan McGregor, and Michael Douglas. Also spotted on the red carpet: Georges St-Pierre, Sasha Grey, Gene Simmons and Shannon Tweed, and Hugh Hefner’s son Cooper.

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Alex Rodriguez was spotted at Staples Center last night for the Lakers vs Rockets game, sitting courtside with some other familiar faces. A-Rod and his new girlfriend, Playboy model and retired WWE wrestler Torrie Wilson, were on a double date with Cindy Crawford and her husband Rande Gerber.

The two couples chatted, laughed, and snapped a picture of themselves on Crawford’s blinged-out iPhone. A-Rod looked sharp in his leather jacket and glasses. He and Wilson started dating about a month ago, when photographers snapped them riding bikes in Miami.

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Khloe Kardashian received a warm welcome in Dallas yesterday, where she cheered on her husband Lamar Odom who was playing his first game with the Dallas Mavericks. The pre-season game against Oklahoma City was a loss for Dallas.

Khloe, who attended the game with her makeup artist, chatted with Mavericks owner Mark Cuban while film crews for the upcoming season of Khloe & Lamar looked on.

Photo: Cherokee Michaels/WENN.com

Boxing legend Evander Holyfield was hanging out with R&B star (and Kim Kardashian ex) Ray J yesterday at a World Series of Boxing event in Los Angeles. The fight night event, which was held at the Music Box, was a clash between the L.A. Matadors and the Moscow Dynamo.

Other celebrities who were there included Ed Helms, Adam Sabbagh, Julie Benz, and Rob Schneider.

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Actress Hayden Panettiere was spotted at the Jets vs Bills game in New Jersey on Sunday with Jets player Scotty McKnight.

Panettiere, who showed her allegiance to the Jets in a green RVCA beanie, and McKnight sat front row. McKnight is a wide receiver who has been on the Jets’ practice-squad injured reserve with a knee injury since early November. The couple have supposedly been dating since June. Panettiere split from her boxing boyfriend Wladimir Klitschko in May.

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Christian Slater was among the celebrities in attendance at the Chris Evert/Raymond James Pro-Celebrity Tennis Classic in Delray Beach, Florida.

The tennis classic is part of a 3-day charity event hosted by former tennis pro Chris Evert.

The events raise money for an ongoing campaign against drug abuse and child neglect in Florida.

Tennis star John McEnroe, pictured above, also came out to show support for Chris Evert’s cause. Actors Scott Foley and Kevin McKidd were some of the other celebrities who participated as well.

Photo: Wenn.com

Loads of celebrities and UFC fighters showed up to the Honda Center on Saturday night to check out and promote the UFC’s first event televised on Fox. On the red carpet set up for arrivals were Mandy Moore, who posed with Jon “Bones” Jones. Other celebrities who came out for the fights included Glee’s Matthew Morrison, Mickey Rourke, comedian Nick Swardson, most of the cast of FX’s Sons of Anarchy including Ron Perlman, and David Arquette.

Former UFC champion Chuck Liddell arrived with his fiance Heidi Northcott. The couple are expecting their first child together next month. Tito Ortiz was there with his girlfriend Jenna Jameson, and other fighters like Anderson Silva and Georges St-Pierre were also spotted.

Mixed martial arts fighter Gina Carano, who stars in the Steven Soderbergh movie Haywire coming to theaters in January was also in attendance.

Cain Velasquez and Junior Dos Santos fought for the heavyweight belt. After only one minute, Dos Santos knocked out Velasquez and won the title.

Photos: Richard Shotwell / PR Photos

Funds raised from the event will go towards the foundation’s efforts to expand educational initiatives which serve to end the cycle of domestic violence.

Athletes in attendance included Jorge Posada, pictured below. The long-time New York Yankees pitcher recently became a free agent but has said a return to the Yanks isn’t going to happen. “I don’t think there’s even a percentage of a chance that I can come back,” he said.

New York Yankees pitcher Mariano Rivera, Sopranos actress Lorraine Bracco, and Los Angeles Dodgers manager Don Mattingly were also among the attendees. Baseball legend Yogi Berra, pictured below, was also at the event.

Photos: Wenzelberg / Splash News and JoeTorre.org