Friends and stars pay tribute to America's comedy sweetheart and her trailblazing television career.

Celebrating the holiday season with a one-hour television event where viewers can enjoy the Grammy Award-winning musical phenomenon Pentatonix performing an array of classic holiday tracks as well as modern favorites.

Go back to the beginning of television's longest-running primetime drama with behind-the-scenes footage, memorable scenes and exclusive interviews with the actors, creators and crew members.