Unless you've been in a coma for the past 24 hours, you've surely caught wind of the changes Instagram's made to its terms of service policy (if not, read here). Once the news broke of the billion-dollar company planning to use people's personal info and photos to better target ads, the Twitterverse lit up in protest with millions of users calling for a boycott of the mobile photography app; many of them being the celebrities. In fact, several stars have said that they plan on quitting and deleting their accounts. From super models to A-listers, here are 25 Celebs Threatening to Quit Instagram so far.