This one's a tuffy,Concerning music from "17 Again"..?

Just saw the flick,and I have to say the music was pretty good...I am wondering,though,which song was playing when Mike (Zac Efron) and Scarlett (Leslie Mann) are dancing in the living room; she mentions that it is the same song that she danced to at her wedding. I've listened to the soundtrack,but that song does not seem to be there..help?