Photo Flash: Lady Gaga's Theatrical Past Shines Through in OSCAR Performance!

At last night's 87th Academy Awards, Lady Gaga stole the show with an impressive performance honoring the 50th anniversary of THE SOUND OF MUSIC. She sang a medley of songs from the movie including "The Sound of Music," "My Favorite Things," "Edelweiss" and "Climb Ev'ry Mountain" and received a standing ovation.

Click here to watch her performance.

It comes as no surprise that Lady Gaga has a theatrical past. Before she became a music star she performed in her high school musical. Check out this photo of her in costume as Adelaide in GUYS AND DOLLS, as she posted on Twitter. What musical would you like to see Lady Gaga in?