"What do you mean, when you nod your head yes but you wanna say no, what do you mean?" the Biebs emotionally croons on his new track. "Better make up your mind, what do you mean?"
Though Dunham's tweet referenced the lyrics almost exactly, the 29-year-old followed up her criticism with a puzzling Instagram photo and the caption, "How could anyone think I have an issue with Bieber?"
Bieber has been on a bit of an emotional roller coaster over the past few days, breaking down sobbing on the MTV Video Music Awards stage and then releasing a super steamy new music video. ET caught up with his latest co-star, model Xenia Deli, to clear up those dating rumors and find out what Biebs is really like on set. Watch below.