Lady Gaga Covers 4 Non Blondes

In case you forgot, Lady Gaga is still traveling the world on her ArtRave: The Artpop Ball tour. While in Vienna, the singer wowed fans with a stunning cover of 4 Non Blondes' '90s hit, "What's Up."

Gaga makes the Linda Perry-penned song all her own, turning it into a nearly 7-minute epic. Watch the live performance below:

Now how long before fans start clamoring for a Perry/Gaga collaboration?

SLIDESHOW | Scenes from Lady Gaga's ArtRave: The Artpop Ball