STAGE TUBE: Audra McDonald Sings 'Climb Ev'ry Mountain at CHRISTMAS AT ROCKEFELLAR CENTER

Just last night, Audra McDonald, who will play the Mother Abbess in tonight's THE SOUND OF MUSIC special on NBC, performed "Climb Ev'ry Mountain" in Christmas in Rockefeller Center. Check out her amazing performance below!

Tonight's the night! The hills will be alive across the country tonight when NBC airs its live television special of The Sound of Music (8 PM ET). We've been counting down the hours until the event, and now that it is finally here, we've gathered some special preview photos and videos below!

Starring country music star Carrie Underwood as 'Maria,' the cast features Audra McDonald ("Private Practice"), who has won five Tony Awards and two Grammys, as Mother Abbess; Stephen Moyer ("True Blood"), who will play Capt. Georg von Trapp; Tony Award winner Christian Borle ("Smash"), who will portray von Trapp family friend Max Detweiler; and Tony winner Laura Benanti ("Go On"), who will portray Elsa Schrader, the captain's one-time fiancee.

"The Sound of Music," set in the 1930s before and during "Anschluss" when the Nazi's annexed Austria, is based on the romantic true story of Maria von Trapp, an aspiring nun who leaves the abbey to become a governess for the widower Capt. von Trapp's seven children. She soon finds herself falling in love with her employer and questioning her religious calling. It premiered on Broadway in 1959 where it broke box-office records and won the Tony Award forBest Musical. The 1965 film adaptation won the Oscar for Best Picture.

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