I saw them at the Fillmore in mid 1999. They were great live.

But what really knocked me out was half way through the second set the singer (sorry don’t remember his name) walked up to the mic and said “this song has been in our heads all week and now we’re gonna put it in yours.”

…And proceeded to play a flawless cover of Hit Me Baby One More Time. The lead singer even did some of Brittny’s moves from the video.