Shazam

TAG, YOU’RE IT: A Great Big World’s “Say Something” (Black Magnetic/Epic) remains atop Shazam’s USA Top 100 Tag Chart this week, while Capitol’s Katy Perry moves to #2 with her surging “Dark Horse.” Big gainers include Robin Thicke’s “Blurred Lines” (Star Trak/Interscope), which jumps #71-49, Capitol’s Capital Cities, whose “Safe and Sound” leaps #67-50, two from Columbia—Pharrell, whose “Happy” bounds #109-72 and Daft Punk’s “Get Lucky,” which zooms #95-76—and M83’s “Midnight City” (Mute) which moves #141-88. You’ll find lots more data about the songs Americans are pointing their phones at right here. (1/7p)