BRITNEY SPEARS, 31
This former Mickey Mouse Club child star grew up to make many successful records...and headlines.
She shed her wholesome image (no drinks, no sex, she previously claimed) in 2007 and entered a drug rehabilitation facility. The day after, she shaved her head because her locks could prove that she had been taking drugs.
In 2008, she entered a psychiatric ward, but was released shortly after.
She has since cleaned up her act.
LINDSAY LOHAN, 27
The former Disney star has seen the inside of a jail cell on multiple occasions.
In 2007, she was jailed a day after pleading guilty to cocaine use and driving under the influence.
In 2010, she served two weeks in prison after failing to attend her court-ordered weekly alcohol education classes.
In 2011, she was charged with burglary after leaving a jewellery store with a necklace. She was sentenced to jail, but served her stint under house arrest.
She has been in and out of rehab since 2007 for drugs, drink driving and violation of probation.
JUSTIN BIEBER, 19
The singer shot to fame with hit song Baby in 2010.
Since then, he has been proving to the world that he's all grown-up, getting over 20 tattoos.
He made headlines last week when he was caught sneaking out of a brothel in Rio de Janeiro covered in bed sheets by his minders.
A video of him sleeping filmed by Brazilian model Tati Neves has been making the rounds.
TAYLOR MOMSEN, 20
The actress has shed the squeaky-clean image she built up playing kid sister Jenny Humphrey in Gossip Girl (2007-2012) and Cindy Lou Who in How The Grinch Stole Christmas (2000).
She now sings for rock band The Pretty Reckless while decked out in fishnets, skimpy outfits and extremely thick eye make-up, no less.
AMANDA BYNES, 27
The former Nickelodeon star has a long list of run-ins with the law.
Last year, she was charged with driving on a suspended licence.
In May, she was arrested for allegedly throwing a bong out of the window of her New York City apartment. In July, she was put on an involuntary psychiatric hold after reportedly starting a fire on a stranger's driveway. In August, her parents were granted control of her affairs.
On Twitter, she is known for her rage attacks on high-profile people such as US President Barack Obama and his wife, Zac Efron, Rihanna and Miley Cyrus.
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