10 Stars Who Went From Mess to Success

You may be worried about Amanda Bynes and Lindsay Lohan, both of whom seem determined to continue on their downward spirals. But, as Radar reminds us, many a formerly troubled star has managed to turn it all around and stage an inspiring comeback. Here are 10:

• Drew Barrymore: As a teen, she struggled with drugs and alcohol—and ended up in rehab before she even got a driver's license. She's now a successful actress and producer.
• Robert Downey Jr.: He used to be known as a total mess of an addict, but now he's known as Iron Man and Sherlock Holmes.

• Rob Lowe: He had a bit of a sex tape scandal in his Brat Pack days—one of the two women in the tape was a teenager—but he's since made a comeback.
• Nicole Richie: Once Paris Hilton's constant companion, she used heroin and struggled with an eating disorder—and was even arrested once for wrong-way driving on the freeway. Now she's back on a successful track—and a mom.
• Angelina Jolie: We all remember her wild child younger days, but she's now a serious humanitarian.

Click for the complete list.