Jessica Sierra Barred from Celebrity Rehab Reunion

When the Celebrity Rehab reunion show airs tonight, fans won't get a chance to see how Jessica Sierra is looking these days.

Legal troubles for this former American Idol finalist have reportedly kept her from reuniting with her friends from the exploitive show.

Daniel Baldwin - who quit the 21-day round-the-clock program after asking to see naked photos of porn star and fellow participant Mary Carey --was the only other Celebrity Rehab subject to not partake in the reunion show, Dr. Drew Pinsky told The New York Post.

Six of the show's participants - two-time The Surreal Life housemate and former Strange Love star Brigitte Nielsen; former WWE wrestler and The Surreal Life fourth-season housemate Joan "Chyna" Laurer; former Family Matters actress Jaimmee Foxworth; Crazy Town frontman Seth "Shifty" Binzer; Carey; and mixed-martial arts star Ricco "Suave" Rodriguez - agreed to participate in the finale that airs tonight.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.