William Shatner

In a contest, appropriately called 'Conan's V-D Explosion,' the talk show host had viewers submit videos of them eating a romantic meal. The winners, DJ and Sabrina from Melbourne, Fla., shared Valentine's Day dinner -- straight from Taco Bell -- on stage throughout the show.

And the surprise guest? None other than William Shatner, who delivered a dramatic reading of Rihanna's 'Umbrella,' to delight of the winners and the audience. Watch the video inside!

"Now that it's raining more than ever, know that we still have each other," he solemnly recited. "You can stand under my umbrella-ella-ella."

'30 Rock' star Jack McBrayer also showed up later in the show to reveal how people celebrate Valentine's Day in Georgia, which involved sending your Valentine "a real, live cow's heart."