No singer is as popular as Taylor Swift — perhaps ever. In November, the country-turned-pop singer became the first woman to replace her own No. 1 song on the Billboard Hot 100 list. Swift’s new song, “Blank Space,” jumped from No. 13 the week before to replace her other song “Shake It Off” as No. 1. Both songs are off her album 1989, which was also the No. 1 album. While Swift is the first woman to replace her No. 1 song, nine men or group acts had previously done so.