What HBO Show is this? SNL kinda show?

I saw this show about a year ago it had skits like SNL but it was hilarious and uncesored. one skit was two guys singing and they're singing bout one guys relationship and one guy says he found a number in his girls pocket and he calls it as he calls he notices that his friend hes singing with phone starts to ring and he answers it and say
"hello im kinda busy right now/
why dont you call me back in a lil while/
call me back/
call me back/
leave me a message"

as he says this his friend just looks at him then they bust out sing bout his friend haveing sex with his girl its hilarious and im really looking for thanks in advance

Its not "Flight of the conchords" the skit i saw was with two blacks guys. The show i saw you wouldnt see the same person very much and some times they'd have some B list actors there

The show was called "Sketch Pad". It was a collection of sketches from different comedy troops like "Second City", the "Groundlings" and others. I remember the sketch you are talking about, it had me laughing hard.

Flight of the Concords

Hilarious show!!

Are they always singing? If so, I think you might be talking about "Flight of the Conchords." Hope this helps. It's the only HBO show I could think of that kind of matches your description.