Grande had previously reached a high of No. 12 on Pop Songs and No. 2 on Rhythmic Songs with her breakthrough hit, "The Way," featuring Mac Miller, last year. "Problem" previews Grande's second album, "My Everything," due Aug. 25.
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"Problem" dethrones Azalea's "Fancy," featuring Charli XCX, after three and four weeks atop Pop Songs and Rhythmic Songs, respectively. On Pop Songs, Azalea becomes the just the third act to replace herself at No. 1 in the chart's 21-year history – and the first to do so with her first two chart entries. OutKast reigned in succession with "Hey Ya!" and "The Way You Move" (featuring Sleepy Brown) in 2003-04. Mariah Carey first switched out songs at the summit with "Fantasy" and "One Sweet Day" (with Boyz II Men) in 1995. (Honorable mention to Adam Levine: he reigned on Maroon 5's "Moves Like Jagger," featuring Christina Aguilera, and directly next as a featured soloist on Gym Class Heroes' "Stereo Hearts" in 2011.)
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Artists replacing themselves at No. 1 has been much more common on Rhythmic Songs, with featured billings (often with rappers) more a part of the format. Azalea is the 13th artist to so double up and the third solo female, following Rihanna (2010), Ashanti (2002) and Carey (1995). One other all-female act has managed the feat: duo Salt-N-Pepa, which reigned back-to-back with "Shoop" and "Whatta Man," the latter featuring another all-female group, En Vogue, in 1993-94. One act even reigned with three successive No. 1s on Rhythmic Songs: 50 Cent. In 2005, he sandwiched featured turns on the Game's "How We Do" and "Hate It or Love It" around his own "Candy Shop," featuring Olivia.
"Fancy" and "Problem" have spent the past five weeks at Nos. 1 and 2, respectively, on the airplay/sales/streaming-based Billboard Hot 100. "Fancy" has sold 2.3 million downloads and "Problem," just shy of 2 million, according to Nielsen SoundScan. Check Billboard.com on Wednesday (July 2) for the latest movement on the Hot 100, while all charts will refresh the following day.