The Material Girl defends streaming service.
Madge has the Internet in a frenzy over the pic.
Kanye West also makes a cameo in the clip.
Nicki Minaj, Katy Perry and more also confirmed for the star-studded clip.
Plus, Kanye changes his album title. (5/4/2015)
"I kissed a girl, and I liked it," the pop star said about the viral smooch.