On the CD and in the booklet it's definately bore but when he's doing a live show he says whore. I went to the Manchester Academy gig and he said whore then. If you wanna check it out the download link is below. Its only short, its the bit where he says she's a player and a downright whore. I love it though cos he always grins after he says it...
http://rapidshare.com/files/19537230/Mika_-_Lollipop__Whore_.mp4.html
p.s. you must have quick time player to view the vid.