conan obrien sings

Conan O'Brien in San Francisco (what are the names of songs)?

When Conan O'Brien did his show in San Francisco that he and this another actor / actor has sung a song … It was snibits aactually 5 songs, as are the names of thoes songs …. plz help

I know. But stop downloading songs illegally, or at least stop to use Limewire. That's all.

Hangover star Ed Helms laments Conan O’Brien on The Tonight Show 1/20/10 (lyrics posted)