Oh, Miley. She loves big butts and she can not lie. She even gave herself the Anaconda treatment with Minaj's RIDICULOUS video first came out. And now she's bestowing the same level of attention on Bieber's newly bared bottom. 

She captioned it "Bieber got back" obvs... For those interested in seeing Bieber's bottom in a less inflated state, here it is it its resting state