4. Macaulay Culkin
Best known for his role as Kevin McCallister in the timeless classic Home Alone and the follow up Home Alone 2: Lost in New York, Macaulay Culkin is the epitome of child star. He reached number two on VH1's list of the 100 Greatest Kid-Stars as well as E!'s 50 Greatest Child Stars. With his blond hair and blue eyes, he was the classic angelic child star, however his later movie's did not have the same box office appeal and work soon dried up. From cute child star to awkward adolescent, he struggled to find a new niche. He has grown up in the public eye and has battled with a variety of problems with his family, as well as alcohol and drugs. He was also sensationally linked with the Michael Jackson sexual abuse case. He dismissed child abuse allegations against the singer as "absolutely ridiculous". Most recently he has reportedly been battling a new extreme addiction to cigarettes and is said to have a 60-a-day habit. It seems that Culkin has experienced the pressures of fame at a young age and it has affected his adult life, leading many to question, what happened to Hollywood's onetime boy wonder?