I can kinda play the bass part of Jason Mraz's "I'm Yours" on my bass guitar... And I can play lots of different songs on clarinet. My junior year in high school, I played the clarinet solo in "King Across The Water" by Sean O'Loughlin. Here's a recording of the song (though not done by my band, haha):
This is kind of a depressing one, haha... I guess I'd want to have one that's kind of optimistic, since everyone there will know that I'll be going to a better place, going back home to Heaven. If I had to pick now, I guess I'd say "With Hope" by Steven Curtis Chapman.