@STAR-LITE

Shes not as skilled in dancing as Britney IMO Niether is Gaga..but it is choreo.

Examples: (search youtube)

Vogue @ Fashion Rocks
Rihanna- Break It Off (Live at New Years 2007)
Rihanna & PussyCat dolls Belgique

or here during rehearsals

http://www.youtube.com/watch?v=cufUQrl9dZk