Songs about being "crazy" (crazy over you, etc.) or "mad" - "nuts" - "insane" - "freaked out" - etc. You get the point.
[ame=http://www.youtube.com/watch?v=XmdtJWmR9zQ]Belinda Carlisle - Mad About You - YouTube[/ame]
[ame=http://www.youtube.com/watch?v=XmdtJWmR9zQ]Belinda Carlisle - Mad About You - YouTube[/ame]