Troubling tweets -- like the ones she sent from the Betty Ford Center while in rehab -- are the least of the problems, legal and otherwise, Lindsay Lohan has dealt with in the past few years.
Britney Spears has settled down and her tweets about her family and new record releases have become almost mundane of late -- at least compared to the head-shaving days of her youth.
Weeks after stirring outrage with his Anne Frank comments, 19-year-old Justin Bieber set off a Twitter storm when he posted a racy cartoon depicting himself in bed with a naked young girl lying on his chest with the words "Justin Belieber" across the top.
Charlie Sheen (pictured with Mike Tyson) isn't that young. But he was a groundbreaker in terms of using Twitter to take his meltdown to a mass audience... and redefining the term "Winning!"
New hair-dos are just some of the fun things Miley Cyrus has tweeted -- along with insults to Selena Gomez, Taylor Swift, Rihanna, New York cops, her landlord ... you get the idea.
The days of rehab for an eating disorder, depression, and drug use are behind her, but Demi Lovato isn't afraid to bring up history on her Twitter. She frequently calls out haters, magazines and even Disney for causing body image issues.
If you look at former Nickelodeon star Amanda Bynes' Twitter, you'll see tweets like, "I'm Not Crazy" and "Believe everything I say on Twitter," which probably is considered a contradiction at this point.
Having grown up with a heroin addiction, the now 49-year-old Tatum O'Neal uses Twitter to assure fans that she's sober and spending time with her children.
Dana Plato's life went off the rails long before social media was introduced to the world. Still, the "Diff'rent Strokes" star's personal problems were well documented by the mass media. She died in 1999, at the age of 34, due to a prescription painkiller overdose.
Todd Bridges, another "Diff'rent Strokes" star, battled a crack cocaine addiction throughout his 20s. He was arrested, tried, and ultimately acquitted for attempted murder in 1988, then in 1993, stabbed a man in the chest in what prosecutors concluded was self-defense. Unlike Plato, however, Bridges was able to overcome his demons and is currently a comedic commentator on "TruTV Presents: World's Dumbest…"
"American Pie" star Tara Reid has managed to avoid taking and uploading career-damaging selfies, but has a really bad habit of getting incoherently drunk in front of other people with cameras.
Chris Brown has been embroiled in controversy since he was arrested for beating then-girlfriend Rihanna in 2009. A few of his greatest hits include a violent outburst in the "Good Morning Studio" studio, brawling with rapper Drake's entourage in a night club, and assaulting Frank Ocean over a parking spot.