It doesn't seem like anyone is happy about Instagram's proposed policy changes -- especially not celebrities!

Instagram added changes to its terms of service which said that, starting on January 16, users' photos could appear in advertisements without permission or compensation. In other words, pics of your drunken escapades could appear on an anti-binge drinking billboard. Or, if you're Kim Kardashian, the bikini pics you post every two seconds could appear in swimsuit ads without your consent.

Several famous faces including Kim K and Anderson Cooper took to Twitter to speak out against the new policy. Find out what they had to say after the jump!