Rocker Ozzy Osbourne's 20-year-old daughter, Kelly, is back in rehab, Us Weekly reports.

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The magazine quotes an unnamed source as saying Ozzy's youngest daughter "slipped into some of her old problems and is not doing so well."

Kelly Osbourne spent time in a Malibu treatment center for an addiction to painkillers in April 2004.

US Weekly said this time, she checked into Las Encinas in Pasadena, Calif., the same facility her brother, Jack, went to for addictions to drugs and alcohol in 2003.

Kelly's return to rehab comes just days before the scheduled release of her latest album, "Sleeping in the Nothing," on Sanctuary Records.