The former teen star has become more known for her bizarre behavior.
Amanda Bynes just keeps getting kookier. In her latest social media aberration, the former Nickelodeon star tweeted pics of her face superimposed onto the bodies of a poodle, a cat and a llama.
But she's not the only one. Earlier this week, Justin Bieber posted a cartoon of himself, topless, embracing a young-looking "Belieber," also topless, to Instagram.
Last month, Miley Cyrus posted a video of herself "twerking" (or dancing) in a unicorn costume. Guess she has a lot of time on her hands...
In this month's issue of Elle UK, Rihanna says: “I’m posting pictures of myself smoking pot to tell the truth about myself." She adds: “Well, I Instagram everything about my life." Clearly!
In 2011, the once Twitter-obsessed Ashton Kutcher apologized for tweeting: "How do you fire Jo Pa? #insult #noclass ... I find it in poor taste." He later recanted with the note: "As of immediately I will stop Tweeting until I find a way to properly manage this feed."
And John Mayer was one of the original oversharers. He quit Twitter in 2010, later admitting that he was a "tweetaholic."
From Amanda to Bieber, let us know: Who is the most social media-mad celeb?