Alison Krauss and Union Station are Grammy darlings, but last night they let loose a little bit with a re-working of the theme song for the 500th episode of 'The Simpsons.'  Listen to the remastered version here.  The Emmy winning 'The Simpsons' show has been on TV for 23 seasons.  That's quite an accomplishment.

Alison Krauss joins a long list of musicians that have lent their talents to the show - Johnny Cash, Dolly Parton, the Dixie Chicks and many more have participated in one way or another to the popular show.