the 'sugar sweet' song (from series one episodes 1,2,3)

Whenever we see sugar, especially when we first see her there's a song with the lyrics:

'I got my eyes on you, you'd be surprised what I wanna do'

I looked at the soundtrack and I couldn't find it, I have searched the net countless times and turn up empty and it's really driving my crazy. I'd be forever grateful to anyone who can help me find out more about this song and where to get it.

Cheers

"Overspecialise, and you breed in weakness. It's slow death"