Flo-Rida's remake of Dead or Alive's 1985 hit "You Spin Me Round". The original song only ever reached #11 on the Billboard 100, but peaked on the UK chart at #1 in 1985 and #5 in 2006 when it was re-released thanks to Celebrity Big Brother. Just a hunch, I think Flo-Rida's version will be bigger.
Flo-Rida - Round Round
Sounds to me like Katy Perry on the hook and quite possibly Dr. Luke on production. Don't quote me though, I'm only about 50% sure.
Fun fact: Beat Kamp, the producers of Savage's hit "Swing", released a single mid last year that also borrowed the hook from "You Spin Me Round". You can check that out here.
I'll update this when I found out more information.