Yo-Yo Ma plays himself on 'The Simpsons' -- and performs theme song
"The Simpsons" on Fox doesn't often feature cameo appearances by classical musicians. One of the most recent examples was eight years ago when tenor Plácido Domingo snapped a towel at Homer Simpson's buttocks in a locker room in the 2007 episode "The Homer of Seville." On Sunday, cellist Yo-Yo...