Serena spent Valentine's Day performing at the Surrey 2010 Celebration site for the Olympics. The show was going swimmingly ::until:: the smoke alarm went off due to some burning incense setting it off. Being the pro that she is, rather than get miffed, Serena did an impromptu singalong with it, sort of an operatic vocal scale that her soundman started to reverb off of. It was pretty hilarious, watch for yourself below!