I'm currentlyin Uni for MT and we are having a "hidden talent" day in which we have to perform a song which includes a talent we have. Mine is that for 15+ years I played violin. However I'm really drawing a blank for songs that I could do. I am a female but I would be open to male songs as well. They also don't have to be form a show it can be a stand alone.
"He Plays the Violin" is absolutely perfect. If it's allowed, maybe change some lyrics to make it about you (She plays the violin! A talent that she's kept hidden!).