As Iggy Azalea's "Fancy," featuring Charli XCX, rises 2-1 on Pop Songs, it becomes the fourth No. 1 by a female rapper in the airplay survey's 21-year history: Lil' Kim led with "Lady Marmalade," with Christina Aguilera, Mya and P!nk, for nine weeks in 2001; Eve's "Let Me Blow Ya Mind" (featuring Gwen Stefani) topped the Aug. 25, 2001, tally; and Missy Elliott ruled as a featured artist on Ciara's "1, 2 Step" for two weeks in 2005. "Fancy" spends a second week atop both Rhythmic Songs and Rap Airplay.