Who says sobriety’s not fun? (two Cougars and a Tigris!)

1. Drew Barrymore

Former child star Drew Barrymore’s drug abuse in her teenage years found her controversial fame, including two trips to rehab that motivated her to get back on track with her career.

2. Mary-Kate Olsen

“Full House” actress Mary-Kate Olsen suffered with anorexia and a related cocaine addiction that led her to rehab. The Olsen twins have since designed a $55,000 pill-covered handbag.

3. Lindsay Lohan

Once the adorable child star in the original film, The Parent Trap, Lindsay Lohan has since lost control of her life, including cocaine and alcohol abuse, DUI arrests, jail time and multiple stints in rehab.

4. Tila Tequila

Bisexual reality dating star Tila Tequila is known for her publicity stunts and drug use.

5. Mischa Barton

“The O.C.” star Mischa Barton has gotten more press for drug use than for acting. Her DUI and marijuana possession have kept her in the spotlight.

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30 Famous Actors and Actresses Who Have Battled Drug Addiction and Alcoholism