Glenn Miller - It Happened in Sun Valley - Sun Valley Serenade (1941) HQ

Sun Valley Serenade is the first of the only two movies featuring The Glenn Miller Orchestra (the other is 1942's Orchestra Wives). Besides "It Happened in Sun Valley", other Glenn Miller tunes in the film are "Moonlight Serenade", "Chattanooga Choo Choo", "I Know Why (and So Do You)", and "In the Mood".