Kelly Osbourne Kelly Osbourne

Kelly Osbourne says her recent stint in rehab was for a decade-long addiction to painkillers she believes could have killed her.

"I knew if I didn't get help, I would die," Osbourne told People. "I'm getting a second chance [at my career] and I want to be present for it."

Osbourne says she first took liquid Vicodin after having her tonsils removed when she was 13.

"I found, when I take this, people like me," she said. "I'm having fun, I'm not getting picked on. It became a confidence thing."

The rock offspring tried to kick the habit by checking into rehab in 2004 and again in 2005. After suffering an "intense relapse," Osbourne voluntarily returned to rehab in January.

The 24-year-old can next be seen alongside her eccentric clan in Osbournes Reloaded, a Fox variety show premiering March 31. What perfect timing to explain everything, Kel.