Must-See: Michelle Obama Appears on 'The Tonight Show'

Last night, First Lady Michelle Obama made a guest appearance on "The Tonight Show" with Jay Leno to discuss a number of topics including the president's singing.

In the candid interview, Mrs. Obama says the president's highly talked about performance was "completely spontaneous." "I didn't even hear about it until it got on YouTube," she tells the late night host. "But he does have a beautiful voice and he sings to me all the time. He doesn't hesitate to show off his lungs to his wife."

Yesterday, an "American Idol" executive producer sent out a tweet to the President asking him to do a duet with Al Green. The president has yet to respond.