In 2009, Cyrus said goodbye to her then 2,119,677 followers and quit Twitter because new beau Liam Hemsworth urged her to. She wrote, "FYI Liam doesn't have a twitter and he wants ME to delete mine with good reason." She's since rejoined and split from Hemsworth.
The rapper took a little break from the social networking site beginning in October 2012, writing, "BE BACK SOON,"
Knightley revealed to Harper's Bazaar she once secretly joined Twitter under a fake name only to delete her account 12 hours later. "It made me feel a little bit like being in a school playground and not being popular and standing on the sidelines kind of going, 'Argh,'" she explained.
Katy Perry's other half temporarily quit Twitter in 2010, writing, "What does this button do?"
The actress said goodbye to Twitter in January 2013 just one week after joining. "Love you guys but I will just never be that girl. Facebook is as much as I can handle. #I'mSorry," she wrote.
Malik pulled the plug on his Twitter account in August 201s. "The reason i don't tweet as much as i use to, is because I'm sick of all the useless opinions and hate that i get daily goodbye twitter," the One Direction singer wrote before deactivating (then later reactivating days later). "My fans that have something nice to say can tweet me on the one direction account :) x."
The "Skyscraper" singer took a Twitter break in Jan. 2012, writing, "Twitter break. It's for the best actually. Who allows me to have this thing anyways?!!! I just get myself in trouble! Haha. Anyway... BYE!"
After one of his many Twitter rants, Baldwin suspended his account (again), writing, "Now f--k this twitter + good luck to all of you who know the truth." He's since rejoined and is as active as ever.
The Client List star called it quits on the social networking site in July 2013, citing the "negativity." She wrote, "I'm sad to say twitter is no longer for me. I have enjoyed all the kindness and love that came my way, as well as support. But this break is needed."
Perhaps not by her own free will, but the troubled starlet stopped tweeting in July 2013 when she got help for psychiatric issues.
MORE PHOTOS: Stars' TBT pics