Justin Bieber - 'What Do You Mean?' (1 Week)
This image appears in the gallery:
Every Big Top 40 No.1 Single Of 2015

8. Justin Bieber - 'What Do You Mean?' (1 Week)
Bieber is back! Justin Bieber's 'What Do You Mean?' is the first No.1 to return to the top spot after losing it earlier in the year.