...that is to say, not very well.
Here's an amazing video of Sir Charles Barkley singing Boyz II Men's "End of the Road" at what appears to be some sort of karaoke bar only to have the Boyz from Philly themselves come up to help him out a bit. It's pretty awesome. Except for every single part in which Charles sings. They're all painfully awful. [video below]
via Jimmy Traina