The House of the Rising Sun by The Animals

Because it's there, it's good, and I know the words.

Rocky Raccoon by The Beatles

Because it's funny enough folks don't notice my singing is...not good.

Baby It's Cold Outside by Dean Martin

If one has to do a duet, this is it. Again, the lyrics are funny enough to draw attention away from my voice. If my partner has a good voice, so much the better.