Instead of picking one picture, I direct you to many photos from the Arenas 25th Birthday bash, including Gilbert Arenas, Caron Butler, Antawn Jamison, Doug E Fresh, and assorted models here.
Another excellent photo collection of Gilbert + other NBA celebrities, including many many Eva Longoria shots, Hasselhoff, Mary J. Blige, and Ellen Pompeo.
2007 All-Star Game
Same person, this time at the 2006 All-Star Game: similarly cool set here. Sorry about the formatting; I tried and tried and couldn't fix it.
This picture needs some explanation, besides Gilbert wearing khakis, ha. In his younger years, Gilbert played at the Rucker in the Entertainer's Basketball Classic.
Check the whole set; includes Fat Joe, Carmelo Anthony, JR Smith, The Game, etc. here.
Photoren has some great shots of other celebs as well. See more of his work here.