News came out Tuesday that Instagram might be in trouble: Its user base is angry that it announced pictures can be used in ads, and people on Twitter have started a hashtag boycott, so you know it's serious.

This is bad news for anyone out there who loves to follow models like Bar Refaeli ("I just read the new Instagram terms of use starting on Jan 16th.. Seriously considering closing my account!.. It's not OK!") on the photo sharing service. So, if we really are about to reach the end of Instagram, we thought it'd be a good time to pay tribute to all the site's hot women who have photographed themselves in various states of undress.

About 40% of this list is Paulina Gretzky photos.