Four celebrities are going toe-to-toe in a Street Fighter showdown for charity: four-time NBA champion Shaquille O'Neal, Super Bowl champion Reggie Bush, rapper Lupe Fiasco, and pro wrestler Natalie Eva Marie.

The ELeague Street Fighter V Invitational is hosting a Celebrity Showdown April 28 on TBS at 10 p.m. ET. Each of the four competitors chose a different charity to represent in the mini-tournament. The winner's charity will receive the bulk of the prize pool that's up for grabs.

Shaq is supporting the Odessa Chambliss Quality of Life Fund , Bush is supporting the 619 Charitable Fund , Fiasco is supporting M.U.R.A.L. (Magnifying Urban Realities and Affecting Lives), and Marie is supporting the American Cancer Society .

Shaq, the biggest of the entrants, seems to have a lot of confidence in himself. While confidence is important in Street Fighter, so are technical skills. If his combo completion looks anything like his free throw percentage from his pro basketball days, he's going to have a tough time making it through his first match.

On the flipside, Marie has racked up a ton of experience inside the wrestling ring. Whether her real-life fighting skills will translate well into Street Fighter remains to be seen, though.

Bush seems to be the dark horse of the showdown. Known for his uncanny ability to catch passes (and interceptions) on the gridiron, Bush's hand-skills may give him an edge over his fellow fighters.

Our money is on Fiasco, though, who has already proven he has the skills to beat even the best professional Street Fighter players in the world.

ELeague is owned by Turner Broadcasting, which also is an investor in Mashable.