Kelly Rowland slayed as Dionne from Clueless, right down to the signature hat.

This image appears in the gallery:
18 Of The Best Celebrity Halloween Costumes

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

10. 18 images

See the full gallery: 18 Of The Best Celebrity Halloween Costumes