Britney Spears longtime manager Larry Rudolph says the singer may never perform again. "As the person who guides her career - based on the information I and all of the professionals who work with her are being told on a need-to-know basis - from what I have gathered it's clear to me she should not be going back to do this Vegas residency, not in the near future and possibly never again," Rudolf told tmz.com.

Rudolph has managed Spears for most of her career, going back to her first album "Baby… One More Time", in 1999.