Actors who sing. Any favorites?

[Cosmic]

I was mightily impressed by Kevin Spacey playing Bobby Darin In "Beyond the Sea" and by his singing (I just got the soundtrack CD.)

Another one I enjoyed was Meryl Streep in "Postcards From the Edge" where, at the very end she kicks out the jams on "Checking Out of This Heartbreak Hotel"; she has a great bluesy country voice.

So, what performances by actors who "don't normally sing" do you like? (Horrific examples are good too )

Best,
C.