A week after Tila Tequila, Jason Wahler and rapper Bizzy Bone signed up for the new season of Celebrity Rehab, the show has been postponed.
TMZ.com reports producers failed to land enough big name stars to front the hard-hitting show.
The programme was scheduled to start shooting on Tuesday (01Jun10).
Reports suggest Lindsay Lohan turned down $1 million (£666,600) to appear on the show.
Past stars who have checked in for Celebrity Rehab have included Daniel Baldwin, Gary Busey, Heidi Fleiss, Mackenzie Phillips, Dennis Rodman and Mindy McCready.
Ex-Hollywood Madam Fleiss signed up for the TV show in an effort to kick addictions to Vicodin and speed, but she didn't think she'd come face to face with Sizemore, who was convicted of physically abusing her.
In a frosty encounter, Fleiss tells the actor, "You're such a loser... The thought of being with you turns women gay."
There's other dramas on the upcoming third season of the show - fallen country star Mindy McCready sparks a medical emergency when she suffers convulsions and basketball bad boy Dennis Rodman is ordered to attend the Pasadena Recovery Center home of the series by a Los Angeles court.
The show premieres in America on 7 January (10).