Due to the universal law of the cool kids, famous people have a knack for being homies with other famous people. So when Charles Barkley began massacring Boyz II Men's "End of the Road," it was only natural that Boyz II Men was actually AT the bar, and got upstage to sing along.         

As Sports Grid's Glenn Davis noted, Boyz II Men managed to succeed where many before them have failed--it's not easy to upstage Sir Charles, but this is as beautiful as such occurance will ever be.

[H/T: Sports Grid]