Anna Kendrick, star of Into the Woods, the Pitch Perfect movies, and most of America's hearts, stopped by Late Night with Stephen Colbert on Thursday. Both Kendrick and Colbert are huge fans of musicals, and during their conversation she schooled the host and the audience about why Pitch Perfect is not technically a musical (because the characters know they're singing, and the music doesn't move the story forward). And then they sang an Irving Berlin song while staring deeply into each other's eyes.