Here's a look at all the Pop Songs No. 1 by members of One Direction. (Zayn departed the act, which is currently on hiatus, in 2015.)
"Watermelon Sugar," one week to-date, Aug. 8, 2020
"Adore You," one week, April 11, 2020
"Strip That Down," feat. Quavo; two weeks, beginning Oct. 14, 2017
"Slow Hands," one week, Oct. 7, 2017
"Pillowtalk," two weeks, beginning May 7, 2016
The Pop Songs chart, which began in 1992, measures total weekly plays, as tabulated by Nielsen Music/MRC Data, among its reporting panel of over 160 mainstream top 40 stations.
As a group, One Direction has tallied 13 Pop Songs entries, in 2012-16, including four top 10s: debut smash "What Makes You Beautiful" (No. 3, 2012); "Story of My Life" (No. 4, 2014); "Drag Me Down" (No. 6, 2015); and "Perfect" (No. 10, 2016).
Only two other groups each feature even two soloists with Pop Songs No. 1s: Fifth Harmony and Destiny's Child. 5H's Camila Cabello has achieved four leaders and Normani has notched one, while the group also earned one: "Work From Home," featuring Ty Dolla $ign, in 2016. Apart from Destiny's Child, Beyoncé has banked six solo No. 1s and Kelly Rowland has scored one. The act collected two No. 1s: "Jumpin', Jumpin' " and "Independent Women Part 1," in 2000-01.
Meanwhile, Louis Tomlinson could make for a clean sweep as far as One Direction members topping Pop Songs. So far, he's earned three entries, reaching a No. 25 high with "Back to You," featuring Bebe Rexha and Digital Farm Animals, in 2017.