Ariana Grande and Penn Badgley Duet Her Song Shut Up

Ariana Grande and Penn Badgley are the duo we never knew we needed! In a behind-the-scenes Instagram video of the singer's appearance on the actor���s podcast, 'Podcrushed,' the two sing her song, 'Shut Up,' together. This comes after Penn appeared as Ariana's crush in her 'The Boy Is Mine' music video.