Lady Gaga’s Amazing Oscars ‘Sound of Music’ Performance [VIDEO]

It was, without a doubt, the most memorable - and surprising - performance of the evening at Sunday night's Oscars. Pop diva Lady Gaga brought down the house with a stunning medley of songs from "The Sound of Music", displaying an operatic range that left even her most knowledgeable fans stunned...and the star studded crowd at Los Angeles' Dolby Theater standing and cheering.