Wheel of Fortune host Pat Sajak incited an uproar this week when he tweeted a message calling climate change activists "unpatriotic racists."
In spite of Sajak's attempt to minimize the backlash — it was "parody," he said — the Twitterverse was not impressed.
But Mr. Would You Like To Buy a Vowel isn't the only celebrity who has had to go on major damage control over 140-characters or less. Here are other dumb things celebrities have put on social media:
This tweet incited a campaign to #CancelColbert. Colbert's show deleted the tweet, which was meant to be a satirical dig against Redskins owner Daniel Snyder's newly formed Washington Redskins Original Americans Foundation:
The actor is known for his Twitter rants (sometimes deemed homophobic), but he was really put on the social media map for his tirade against American Airlines after he was kicked off a flight for refusing to stop playing Words With Friends:
The comedian was fired from his job as the voice of the Afflac duck after tweeting jokes about the tsunami in Japan:
People did not react well when Madonna Instagrammed a photo of her 13-year-old son Rocco holding a gin bottle in celebration of the new year. (She said he wasn't drinking).
Days later, Madonna had to issue an apology after referring to her son as "#disnigga" in an Instagram. The photo of Rocco boxing was later deleted.
The director tweeted what he thought was the address of George Zimmerman to his 240,000 followers in February 2012. It belonged to a unconnected Florida couple who later sued the director.
The singer's account was deleted after he got in a vulgar Twitter battle with comedian Jenny Johnson, who has been known to make jokes about Brown's relationship with Rihanna:
The former child star raised eyebrows with this one:
Kutcher had to apologize after questioning Penn State coach Joe Paterno's firing — the actor said he was unaware of the sexual abuse charges. (Always look before you tweet):
In 2011, Crowe came out against circumcision tweeting, " many jewish friends, I love my Jewish friends, I love the apples and the honey and the funny little hats but stop cutting yr babies @eliroth" followed by this doozy:
The young star had to delete her Twitter account after officially declaring herself "Team Jacob." While this isn't controversial to most, members of "Team Edward" were displeased to the point of harassment.