You know, if her team was smart they'd realize the best promo for Vegas would be performing on television which would also promote the album (unless she is just as bad as GMA 2011 then I would see why they wouldn't have her perform )
But anyway, the past three eras or maybe even all of them, she had never rehearsed an entire show before an album came out, so I'm sure her dancing would be much better than GMA 2011.