It's the duet we never knew we absolutely HAD TO SEE! The Grammys are going all out this year with a whole slew of amazing performers , but this is a once in a lifetime event! Sara Bareilles will be performing a duet with the legendary Carole King! Speaking of that megabit, what song do you think they'll perform? The unfortunate thing about a list of hits as long as Carole's is that it's so hard to choose! Where You Lead , A Natural Woman , Will You Love Me Tomorrow?