Song from caveman dancing on Saturday Night live??

There was a SNL rerun on last night with music guest AFI. I forgot who the host was, but there was a segment on the first man to dance. In this skit came out two cave men. One of them suddenly stands up and starts dancing to some techno music and he suddenly pulls out glowsticks!!! lol- I'VE HEARD THE SONG BEFORE BUT I COULDN'T FIGUERE OUT WHO IT WAS BY! Do you know???????? THANKS!