Lady Gaga debuts at No. 1 on the Feb. 15-dated Hot Dance/Pop Songs tally with “Abracadabra,” becoming the second chart-topper in the survey’s five-week history. Tate McRae ’s “It’s Ok I’m Ok” drops to No. 6 after reigning for the list’s first four frames.

Unveiled through a MasterCard commercial, Gaga treated her high-octane new single to an artsy music video that trades primarily in red, black and white hues. "The category is: dan