This is more R5 than we've ever seen! Riker Lynch posted a photo baring all with Ross Lynch and Rocky Lynch. (Yes, you can see bare butts. Yes, even Ross' butt.)

Riker posted the photo, writing, "When there's only 1 shower and it's running low on hot water…"

Um, that's definitely a scandalous response to a lack of hot water. Now we just have one question: Who took the photo?! Excuse us while we try to recover from the shock of seeing this pic. It's a doozy.

MORE: 8 SCANDALOUS DELETED PHOTOS CELEBRITIES NEVER WANTED YOU TO SEE

Click through to see more times celebrities bared it all on social media, and let us know which photo is the most shocking in the comments!