Only On RadarOnline.com: Amber Smith To Re-Enter Rehab

Amber Smith, who appeared on both VH1's reality show Celebrity Rehab and it's spin-off, Sober House, tells RadarOnline.com exclusively that she is about to re-enter rehab for three weeks.

Smith -- who's battled personal demons for years-- says while she is  being treated for an addiction, it is not for drugs and alcohol.  She  would not elaborate.

As someone who has been in and out of rehab, RadarOnline.com asked  Smith to comment on the struggle of Redmond O'Neal to stay clean.

As RadarOnline.com previously reported, O'Neal -- the troubled son of  actors  Ryan O'Neal and Farrah Fawcett --was kicked out of the  Clearview Treatment Center in Venice, California on Wednesday for "a dirty test," according to a source.

Regarding Redmond, Amber exclusively told RadarOnline.com:  "He (Redmond) isn't ready yet.. I OD'ed, almost lost my life and yet used  again the minute I got out of the hospital. You simply don't have the motivation to change until you hit rock-bottom. I didn't! I hope he hits bottom without dying!"

The 24-year-old Redmond had been enrolled in the rehab as part of a sentence for a drug-related charge. His absence from rehab is a parole violation, the source said.