Sarah Michelle Gellar @ DJ Cassidy's Party

Sarah Michelle Gellar and R&B songstress Cassie celebrate the 26th birthday of DJ Cassidy — one of the most sought after DJs in the industry — at a private party at NYC hotpost Tenjune on Wednesday. Noticeably missing was Gellar‘s hubby Freddie Prinze Jr.

Live performances were made by Jeff Red, Naughty by Nature and Big Daddy Kane. Ronson, Q-tip, D-Nice and Juske all had DJ sets.

Other celebrities filling up the place wall-to-wall included Diddy, Jermaine Dupri, Russell Simmons and hip-hop violinist Miri Bin Ari.