I've been playing and singing the Richard Thompson version of Britney Spear's "Oops I Did It Again" for a few months now at gigs and it always gets a nice response, so I am looking at the Lady Gaga catalog for a similar treatment. The only one I found that might work is "You and I". I'll have to change the lyrics to sing it from a male perspective, but it has a nice rhythm for a string band and a solo section that is a good excuse to play some fast notes. Anyone else have any other suggestions from her catalog?
I think the trick here is to pick a song that is going to make folks smile when they see/hear a 55 year old guy who bears some resemblance to Santa Claus singing it.