Number one US songs in January, 2016

What songs were number one in January, 2016? There were 2 USA #1 songs in January, 2016.

These number one songs in January, 2016 began with Hello by Adele which went to #1 on 14th November, 2015 and remained at the top spot for 10 weeks.

The last number one song of 2016 was Sorry by Justin Bieber which went to #1 on 23rd January, 2016 and remained at the top spot for 3 weeks.