He was joined by girlfriend Kylie Jenner and her friend Jordyn Woods to bring in the New Year.

This image appears in the gallery:
21 Pictures You Shouldn't Have Missed This Week (2nd January)

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 

10. 21 images

See the full gallery: 21 Pictures You Shouldn't Have Missed This Week (2nd January)