Nathan Fillion & 'The Rookie' Cast Invite Kelly Clarkson To Guest Star

The cast of Kelly's favorite show "The Rookie" surprises Kelly for her 40th birthday party! Nathan Fillion, Mekia Cox, Alyssa Diaz, Melissa O'Neil and Eric Winter share some of their favorite birthday memories, and why they all stay away from Nathan when he's eating a banana on set. The cast also reacts to Kelly's throwback appearance as an extra in "Sabrina The Teenage Witch," and invite Kelly to showcase her acting talents as a guest star on "The Rookie."