Big Sean and Ariana Grande looked good together (until they split up later in the year!)

This image appears in the gallery:
100 Instagram Photos You Never Expected To See In 2015

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

10. 100 images

See the full gallery: 100 Instagram Photos You Never Expected To See In 2015