Jessica Sierra's legal troubles have apparently kept her from reuniting with her friends from rehab.

The former American Idol fourth-season finalist was a no show at VH1's Celebrity Rehab with Dr. Drew reunion special taping, David Drew "Dr. Drew" Pinsky told The New York Post in a Wednesday report.

Actor 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, Pinsky told The 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 Celebrity Rehab's reunion, according to Pinsky.

Pinsky also told The Post three of the aforementioned celebrity participants accepted his offer of an expense-free three months at a "sober living" facility after filming for the series was complete.  The identities of the three who accepted the offer will be revealed during Celebrity Rehab's finale broadcast this Thursday at 10PM ET/PT on VH1.

Even Jeff Conaway -- a former Celebrity Fit Club third-season contestant who was rushed to the hospital during filming for Celebrity Rehab after experiencing a seizure -- participated in the reunion show, Pinsky told The Post.

Following filming for Celebrity Rehab last fall, Sierra was arrested after she was being booted from a Florida bar and allegedly became physically and verbally combative with police.  She was charged with disorderly intoxication, resisting arrest without violence and probation violation before subsequently pleading not guilty.

Sierra was sentenced to a yearlong stint in rehab followed by three years probation.  She is currently receiving her rehabilitation treatment at California's Pasadena Recovery Center.

Celebrity Rehab's reunion show will air Thursday, March 13 at 10PM ET/PT. 
About The Author: Christopher Rocchio
Christopher Rocchio is an entertainment reporter for Reality TV World and has covered the reality TV genre for several years.