There's little doubt that Britney Spears' career is back in a big way - but at what cost? Is she being forced to do too much by her handlers?

Despite an upbeat ending to a year that began with her getting strapped to a gurney (twice), and has seen her overcome a nearly 15-month aversion to pants and underwear, some believe the singer is being pushed too hard, too fast.

"It is too much for her," an insider tells celebrity news magazine OK! "They pack her schedule too tight and now they're trying to find free time."

Despite the success of her new album, Circus, the "signs of cracks in Brit's armor are already beginning to show," says a source close to Spears.

What do you think? Is she being asked to do too much, only to be set up for another epic fall? Let us know your thoughts via the survey below ...

Is Britney Spears being pushed too hard?