If you've got a killer voice like Sam Stulberg, you basically HAVE to serenade your wife at your wedding. It's just the rules. Sam is setting a great example for future grooms, as he treats his lady, Caitlin, to a romantic serenade. He absolutely kills it, and she's loving every second.
If that's not really your style, you could go a different route. RTM producer Kristin and Jeremy decided to celebrate their wedding by rapping "Get it Together" by Beastie Boys, featuring Q-Tip, for their guests to enjoy. Either way, these newlyweds know how to break it down!