Ours was Michael Buble, Everything
We would have preferred something from the Grease 2 soundtrack (!!) as we have a mutual love of that film, and spent many a night singing karaoke versions years ago when we were just friends. In the end we settled for Michael Buble, and got the DJ to play most of the soundtrack throughout the night (including "Reproduction", which was ironic as I discovered I was pregnant 2 days after the wedding!!)