Madonna Makes Surprise Appearance With AVICII

After her introduction, she joined the Swedish producer and DJ behind the decks and together they premiered his remix of her new single "Girl Gone Wild" from her upcoming album MDNA.

"I've been here in spirit for many years, but it's good to finally be standing on the stage, looking at all you people who have come here from all around the world," said MADONNA as she took Ultra's Main Stage.