From Robbie’s official website:

Bodies was the first single to be taken from Robbie’s album, Reality Killed The Video Star…. and to think it almost didn’t happen; Robbie told us in his blog that he didn’t think Bodies was going to be a single, even Trevor Horn (who produced Robbie’s forthcoming album, Reality Killed The Video Star) said:

“Bodies was a rank outsider. Initially, we were definitely not considering it as the first single, but I tried changing from electronic instruments to real instruments and it suddenly blew everyone’s heads off and Robbie loved it.”