This morning, Britney Spears released her newest song, "3," off of her upcoming compilation album, The Singles Collection . The singer just wrapped her US tour in Vegas with Jason Trawick and her boys and has a break for a month before traveling down to Australia. This saucy song goes right along with the naughty/nice theme she's used her whole career so tell us what you think - hit the dance floor or leave the club? Britney Spears's "3" - Hit the Dance Floor or Leav