Alessia Cara

Alessia Cara photographed backstage at the 2016 Women in Music awards on Dec. 9, 2016 at Pier 36 in New York City.

Meredith Jenks

Alessia Cara crowns Billboard's Pop Songs radio airplay chart (dated Feb. 4) with "Scars to Your Beautiful." As the song lifts 2-1, it becomes her second Pop Songs leader; her breakthrough hit "Here" led a year ago to the week, topping the Feb. 6, 2016, tally. Both tracks are from her first LP, Know-It-All.

Cara is the first artist to notch two Pop Songs No. 1s from a debut full-length since Iggy Azalea. The rapper's The New Classic yielded "Fancy" (featuring Charli XCX; three weeks at No. 1) and "Black Widow" (featuring Rita Ora; one) in 2014.

A second Pop Songs No. 1 follows the Rule Breaker honor that Cara earned in December at Billboard's 2016 Women in Music celebration, claimed in part for the novel, anti-party "Here" storyline. Meanwhile, at the MTV Video Music Awards pre-show in August, she performed "Scars" without wearing makeup, saying, "I'm not doing it just to be a rebel. I want to show people alternatives to [conventional] standards of beauty. I always find power in struggles. You end up a lot happier that way."

All charts will update tomorrow (Jan. 24) on Billboard.com.