"Dancing with the Stars" turned 100 on Tuesday, May 6, and the show partied at the Day After nightclub in Hollywood, following the elimination of the eighth couple -- MARIO and KARINA SMIRNOFF.

The bash, which was hosted by BBC Worldwide America and sponsored by People magazine, saw the return of such past season favorites as LAILA ALI, SABRINA BRYAN, JENNIE GARTH, JERRY SPRINGER and LISA RINNA.

Earlier in the evening, on the air, "DWTS" also celebrated with the return of several of its alum. Season four champs APOLO ANTON OHNO and JULIANNE HOUGH performed a new dance, as did season five finalists MEL B. and MAKSIM CHMERKOVSKIY.

MARIO LOPEZ also returned and performed a number from his Broadway show, "Macy's Stars of Dance" Presents A Chorus Line.