Apple said the Madonna-influenced dance track, which Gaga performed after climbing out of a giant egg at the Grammys, is now No. 1 in 23 countries. It already went to the top of Billboard's Hot 100 singles earlier this week.
Gaga gave away some of her secrets for creativity in a radio interview on Sirius XM Friday, saying she likes to party, but pays the price in the gym.
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"I am on the drunk diet," she said. "I live my life as I want to, creatively. I like to drink whiskey and stuff while I am working. But the deal is I've got to work out every day, and I work out hung over if I am hung over. And it's about the cross-training and keeping yourself inspired. I have to say, I do a ton of yoga," she added.
She also said she sees herself making the move to acting, though she has another actress in mind if a film about her is ever made.
"I am such a Marisa Tomei fan. All my friends call me Marisa when I get angry. Because my New York accent just flies out of my body and I start smacking my gum," she said.