She tries. I mean she wants to be a good dancer because she has this image of a blonde popstar that needs to dance in order to be the queen of pop but I don't think she's particularly good at it, yet.
Is she a TALENTED dancer? I wouldn't say that. I think she's okay though and better than people who have only danced for certain singles like Selena, Rihanna, or Katy. When she's got good choreography though she does it pretty well. Applause, Marry The Night, Judas, and Poker Face had cute little choreography steps that were kind of challenging (bar Poker Face).