Stephen Colbert and Rachel Bloom did a musical interview

Due to the fact that Stephen Colbert and Crazy Ex-Girlfriend's Rachel Bloom are awesome, they decided to conduct part of Bloom's appearance on last night's Late Show in song.

The set up was Colbert wondering how musicals work. How, he asked, does it make sense for people to talk like normal and then suddenly burst into song? 

“That doesn't happen in the real world,” Colbert said.

“I'd like to think it could,” said Bloom.

And then they burst into song and a Music Man-style rap (I guess Bloom's not quite ready for Hamilton), which all pretty much came to an end when Bloom started thinking about how much weight she's gained since winning that Golden Globe.