The 'Domino' singer tweeted that it was time for a change as she showed off her new hair.

This image appears in the gallery:
GQ Men Of The Year Awards 2012 In Pictures

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

10. 13 images

See the full gallery: GQ Men Of The Year Awards 2012 In Pictures