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Gloves Up - The ight of the century is going down right now: Floyd Mayweather, Jr. and Manny Pacquiao face off at the MGM Grand Garden Arena. While tickets are priced way out of most people's league — some estimates are in the tens of thousands for a single seat — celebrities have seized on the opportunity. Here's who's in Las Vegas for the big fight. (Photo by Stephen Dunn/Getty Images)

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Roc Royalty - Beyoncé and Jay Z look dead serious about the outcome of the fight — no doubt Mr. and Mrs. Hov had a stake in the outcome. (Photo: Al Bello/Getty Images)

Photo By Photo: Al Bello/Getty Images

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Sheee-it - The Wire actor Isiah Whitlock Jr. reps for HBO at a VIP pre-fight party before the fight. (Photo FilmMagic/FilmMagic)

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Taking the Stance - Antoine Fuqua and Jake Gyllenhaal, who recently wrapped production on the boxing drama Southpaw, look pumped up to see the real thing.(Photo: Ethan Miller/Getty Images for SHOWTIME)

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Talk That Talk - Sheryl Underwood was definitely amped for Fight Night as she sips a cocktail. (Photo: Ethan Miller/Getty Images for SHOWTIME)

Photo By Photo: Ethan Miller/Getty Images for SHOWTIME

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Ones and Twos - Funkmaster Flex still scratchin' the tables at this after-party at Chateau Nightclub & Rooftop. (Photo: Bryan Steffy/WireImage)

Photo By Photo: Bryan Steffy/WireImage

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But First... - Nicki Minaj makes her best selfie face with the Funkmaster behind the DJ booth. (Photo: Bryan Steffy/WireImage)

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Where's Key? - Comedian Jordan Peele gives us a sly smile at the Showtime and HBO pre-fight bash. (Photo: Ethan Miller/Getty Images for SHOWTIME)

Photo By Photo: Ethan Miller/Getty Images for SHOWTIME

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Ready to Rumble - Gayle King was Vegas-ready at the Showtime and HBO VIP Pre-Fight Party for Mayweather vs. Pacquiao.(Photo: Ethan Miller/Getty Images for SHOWTIME)

Photo By Photo: Ethan Miller/Getty Images for SHOWTIME

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Date Night - Erica Mena and her fiancé Shad Moss, who recently revealed they live with Shad's mother, got all dolled up for a night on the town.  (Photo: Bryan Steffy/Getty Images for SHOWTIME)

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House of Cheadle - Don Cheadle and his partner, actress Bridgid Coulter, stop by HBO and Showtime's pre-fight Bash. Cheadle stars in Showtime's House of Lies. (Photo: FilmMagic/FilmMagic)

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Next Flight to Ohio - Dave Chappelle looks like he's over all the Fight Night hype as he tries to have a good time at The Bank Nightclub at the Bellagio. (Photo: Gabe Ginsberg/WireImage)

Photo By Photo: Gabe Ginsberg/WireImage

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A Long Way From Queens - The King of Queens star Victor Williams takes a break from watching the NBA playoffs to enjoy some Fight Night activities.   (Photo: Bryan Steffy/Getty Images for SHOWTIME)

Photo By Photo: Bryan Steffy/Getty Images for SHOWTIME

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All Smiles - After a tough year, Tank looks ready to relax and have a good time at The Bank Nightclub.  (Photo: Mindy Small/FilmMagic)

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Too Much Drama - Looks like Mary J. Blige isn't happy with the way the fight was going. (Photo: Al Bello/Getty Images)

Photo By Photo: Al Bello/Getty Images

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Shine On - Shameless actress Shanola Hampton lights up the room at Showtime's VIP post-fight dinner at the MGM Grand Hotel & Casino. (Photo: Ethan Miller/Getty Images for SHOWTIME)

Photo By Photo: Ethan Miller/Getty Images for SHOWTIME

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Game Time - NBA legends Reggie Miller and Charles Barkley took a night off of playoffs commentary to party on Fight Night. (Photo: Bryan Steffy/Getty Images for SHOWTIME)

Photo By Photo: Bryan Steffy/Getty Images for SHOWTIME

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No Flex Zone - Pooch Hall points out what time it is at the Showtime and HBO VIP Pre-Fight Party. (Photo: Bryan Steffy/Getty Images for SHOWTIME)

Photo By Photo: Bryan Steffy/Getty Images for SHOWTIME

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This Way... That-a Way - Michael Eric Dyson gives directions to a pre-fight party. (Photo: FilmMagic/FilmMagic)

Photo By Photo: FilmMagic/FilmMagic

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Case Study - Michael B. Jordan, who will soon be seen as Apollo Creed's grandson Adonis in the upcoming Rocky spinoff, was probably paying close attention to Mayweather and Pacquiao's form in the ring. (Photo: Ethan Miller/Getty Images for SHOWTIME)

Photo By Photo: Ethan Miller/Getty Images for SHOWTIME

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Team Pac - Mark Wahlberg rallies for Pacquiao ahead of the big fight. (Photo: FilmMagic/FilmMagic)

Photo By Photo: FilmMagic/FilmMagic

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Sing It, Jamie - Jamie Foxx learned the hard way that you don't mess with the National Anthem. The actor and Grammy winner was slammed for his rendition of the "Star-Spangled Banner" before the Mayweather-Pacquiao fight. (Photo: Al Bello/Getty Images)

Photo By Photo: Al Bello/Getty Images

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Niecy in Red - Niecy Nash was a vision in all red everything on the arm of her husband Jay Tucker. (Photo: FilmMagic/FilmMagic)

Photo By Photo: FilmMagic/FilmMagic

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Money Team 4 Life - 50 Cent proves it's bros over beef in an Instagram flick with Money May and Being Mary Jane's Omari Hardwick.(Photo: 50 Cent via Instagram)

Photo By Photo: 50 Cent via Instagram

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Model Behavior - Love & Hip Hip: Hollywood's Hazel-E and Blac Chyna chose sides –- side boobs –– to host the Welcome To Vegas Kick off Party Friday night.(Photo: WENN.com)

Photo By Photo: WENN.com

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Born to Be Somebody - Justin Bieber's star entourage aligned for a party at Rehab inside Hard Rock Hotel & Casino Las Vegas.(Photo: Judy Eddy/WENN.com)

Photo By Photo: Judy Eddy/WENN.com

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Champions Aren't Made in Gyms - His dad played a boxer on TV. One of the more camera-shy Smiths, Trey poses for a solo shot outside of Rehab.(Photo: Judy Eddy/WENN.com)

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Still the Best - DJ Khaled took his "takeover" bus to Vegas and stopped by Diddy's Fight Weekend Bash at Lavo inside The Palazzo Resort Hotel Casino Las Vegas.(Photo: Judy Eddy/WENN.com)

Photo By Photo: Judy Eddy/WENN.com

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Beck's Pecs - Tyson Beckford is among the first stars to arrive in Vegas for "Fight Weekend," and will stay long after the last blow. The actor will be the celebrity guest host at Chippendales through May 24th. (Photo: Thaddaeus McAdams/FilmMagic)

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Throw 'Em Up - Tyrese gets ready to party at Vanity Nightclub at the Hard Rock Hotel & Casino in advance of the fight. (Photo: Mindy Small/FilmMagic)

Photo By Photo: Mindy Small/FilmMagic

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Ciroc on Ice - Diddy, looking retro cool in a Charlie Brown-striped sweater, hosted his Welcome to Las Vegas Kick off Party at Lavo and repped for the Ciroc Boys. (Photo: Thaddaeus McAdams/FilmMagic)

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Mean Muggin' - Big Tigger is in beast mode at Diddy's party the night before the big fight. (Photo: Thaddaeus McAdams/FilmMagic)

Photo By Photo: Thaddaeus McAdams/FilmMagic

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Say Hello to Bow Wow - Shad Moss rocks a throwback look, complete with bucket hat and chains, in Vegas this weekend. (Photo: Thaddaeus McAdams/FilmMagic)

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The Lord and Lady of Las Vegas - Reality stars Scott Disick and Kourtney Kardashian party at 1OAK with a group of pals. (Photo: Gabe Ginsberg/WireImage)

Photo By Photo: Gabe Ginsberg/WireImage

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He Wildin' - Fabolous looks serious when spotted at Diddy's Welcome to Palazzo party. (Photo: Thaddaeus McAdams/FilmMagic)

Photo By Photo: Thaddaeus McAdams/FilmMagic