Britney Spears is battling stagefright in the hours before her big comeback tour kicks off - but promises fans a "spectacular pop extravaganza".
The singer kicks off her first tour in five years in New Orleans, Louisiana on Tuesday night (03Mar09), and her manager Larry Rudolph reveals Spears performed a flawless rehearsal on Monday (02Mar09) night, but is fighting nerves ahead of her curtain call.
Speaking on DJ Ryan Seacrest's radio show on Tuesday, Rudolph said, "You can expect spectacular-ness.
"We ran the show twice yesterday until two or three in the morning, and it was amazing... perfect. She goes full-speed the whole show - about an hour-and-a-half. It's pretty intense."
"This is a full-blown, full-out Britney Spears show. It is a pop extravaganza. It is everything everybody expects from her - and more!
"There are so many highlights to this show. The costumes are amazing. It's the biggest production out there and maybe the biggest production ever launched. We have circus performers, aerialists, dancers, martial artists - we have all kinds of things.
"She has this nervous energy. She's got this way of channelling it. I've said to her before that if you were on a football team and you were going to the Super Bowl, they'd want you to be their quarterback. When it comes to game day, nobody brings it like she does. She takes that nervous energy and turns it into the most amazing show."