David Letterman waves goodnight after the Girl's Generation performance.

Last night, Girl's Generation rocked the stage of the David Letterman show with an upbeat rendition of their English song "The Boys".



This is the best performance of this song I've seen from the girls! You can really tell they worked hard to get the pronunciation down and they really left an impression on the guests. Well look forward for the girl's performance today for "Live! With Kelly!". For those living on the east coast, the show will be aired at 10 on ABC! Don't miss it! It's sure to be daebak!