Charli XCX's "Boom Clap" overtakes Ariana's "Break Free" to become pop's fastest-rising song.

Unwilling to slow down, Charli XCX’s breakthrough solo effort “Boom Clap” has officially become the fastest-rising song at pop radio.

According to Mediabase, the song’s spin count of 8,842 for the seven days ending July 25 represents a week-over-week gain of 1,942. No other song on the format is gaining airplay with more velocity.

The song, which was the 9th-most-played-song during the measured period, reached an audience of 51.82 million in that window.

While it, at least for today, cannot lay claim to the distinction of being pop’s greatest gainer, Ariana Grande’s “Break Free (featuring Zedd)” is still catapulting into pop radio dominance. The song’s 6,103 spins during the aforementioned seven day period represent a gain of 1,936 spins. It was pop radio’s second-fastest-rising song and its 13th-most-played song overall.

Other top five gainers include Sam Smith’s #4 “Stay With Me” (+1,871 to 14,657), Disclosure’s #5 “Latch (featuring Sam Smith)” (+1,399 to 13,655) and Iggy Azalea’s #18 “Black Widow (featuring Rita Ora)” (+1,357 to 4,299).

In addition to the aforementioned Sam Smith, Disclosure and Iggy Azalea songs, tracks enjoying impressive acceleration in their week-over-week spin gainers include Meghan Trainor’s #38 “All About That Bass,” Florida Georgia Line’s #28 “This is How We Roll (remix featuring Jason DeRulo),” Tove Lo’s #39 “Habits,” Pharrell’s #12 “Come Get it Bae” and Enrique Iglesias’ #19 “Bailando (featuring Descemer Bueno, Sean Paul and Gente de Zona).”

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