The comedienne reveals she had "about five" stars who were placed on a "Do Not Ask Back" list following appearances on "The Rosie O'Donnell Show", which ran from 1996 to 2002, and one of her least favourite guests was Garrett.
Sharing the story of how he got himself banned from her set, O'Donnell told "Watch What Happens Live" host Andy Cohen, "One guy, Leif Garrett, came with a fresh wound from a pipe that he used for crack. He sort of gnawed it out."
"So when I met him in the green room, he had a normal face and he came out (on camera) a few minutes later and he had a huge red welt of burn (sic) from being in the green room those 20 minutes I didn't see him."
"People who are that messed up shouldn't be on TV."
Garrett, who has a long history with substance abuse, was a featured guest on "The Rosie O'Donnell Show" back in 1999, shortly after the airing of his VH1 Behind the Music special. On the episode, he was confronted by former friend Roland Winkler, who had been left paralysed 20 years prior when Garrett crashed his car while under the influence.
Garrett, 58, was back in the headlines just two months after appearing on "The Rosie O'Donnell Show", when he was arrested for attempting to buy drugs from undercover officers in Los Angeles.
He has been in and out of legal trouble ever since, but is said to now be sober.