Taylor Swift鈥檚 enemy list is pretty plump these days, as her feuds with other celebs keep flaming. Kim + Kanye, Nicki Minaj, Demi Lovato and Katy Perry have ALL been caught up with drama of one kind or another with the 鈥淏ad Blood鈥 singer. As has Justin Bieber, who is perfectly happy to pop up merely to antagonize his foe every once in a while.

The animosity apparently began back when the Biebs was dating Tay鈥檚 #girlsquad member Selena Gomez. Taylor and Justin reportedly did not click at all and since have occasionally thrown nasty shade each other鈥檚 way.

This time around, Justin wanted to make sure his fans were still aware of his disdain for Swift by jumping on Ellen Degeneres鈥 Snapchat to sing a snippet of Taylor鈥檚 song 鈥淚 Knew You Were Trouble.鈥 He also added the clip to Instagram with the caption asking, 鈥淲ho even likes taylor swift?鈥 Obviously not Justin. Ouch.

Do you think Justin singing Taylor鈥檚 song is pretty funny or pretty petty? Tweet us @BritandCo!

(h/t Refinery29; gif via Giphy)