Top 10 Rejected Josh Groban Songs On Letterman (VIDEO)

We haven't seen Josh Groban have this much fun on late night since he was singing Kanye's tweets on "Jimmy Kimmel Live." You know, back when Kanye's tweets were something we talked about.

Groban, who landed a role in the new Steve Carell/Ryan Gosling rom-com "Crazy Stupid Love" stopped by "The Late Show" Monday night to help out David Letterman with the "Top Ten List."

In what could definitely be Letterman's least yawn-inducing list this year, Groban offers ten snippets of "rejected" songs about news and pop culture. Watch the video and tell us which one should be a real song in the comments below (we're thinking that Marcus Bachmann tune might be pretty catchy).