According to wikipedia, Justin Bieber is twice more popular than One Direction.

Free-use image: see details.
Justin BieberOne Direction 1 014 283 total views 465 130total views

During the month of January 2018, the 137 articles about Justin Bieber have been consulted 1,014,283 times. The 88 articles about One Direction have been consulted 465,130 times.

For Justin Bieber, the most consulted versions are :
  1. Justin Bieber (en) : 421,444 visits
  2. Justin Bieber (es) : 89,523 visits
  3. Justin Bieber (de) : 89,260 visits
  4. Бибер, Джастин (ru) : 70,862 visits
  5. Justin Bieber (fr) : 45,111 visits

And for One Direction :

  1. One Direction (en) : 204,791 visits
  2. One Direction (es) : 44,839 visits
  3. ワン・ダイレクション (ja) : 25,490 visits
  4. One Direction (de) : 24,285 visits
  5. One Direction (ru) : 22,574 visits