Coming in at No. 2 on the Billboard Hot 100 is Pharrell Williams' "Happy", followed by Ariana Grande's "Problem" featuring Iggy Azalea at No. 3, Azalea's "Fancy" featuring Charli XCX at No. 4 and Katy Perry's "Dark Horse" featuring Juicy J at No. 5.
Rounding out the top tier are Jason Derulo's "Talk Dirty" featuring 2 Chainz at No. 6, DJ Snake and Lil Jon's "Turn Down for What" at No. 7, Justin Timberlake's "Not a Bad Thing" at No. 8, Idina Menzel's "Let It Go" at No. 9 and Bastille's "Pompeii" at No. 10.
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