Does anyone know that song?

Does anyone know the name of the song that Harry shum danced to? During his glee tour and his Showcase (on youtube) the part where he was doing the robot!!! I NEEEDDDD TO KNOW WHAT SONG THAT IS... I heard it once before, but that was like ages ago....SOMEONE PLZ TELL ME! I'm like a Major oldies fan! Lol Sorries if I freak nayone out by doing all of that uppercasing...lol