Britney gets airsick during Las Vegas announcement

An airsick Britney Spears arrives to her announcement for her new show at Planet Hollywood Vegas. Photo / AP

After months of rumours and hint-dropping, pop icon Britney Spears revealed what she called her "not-so-secret" news - she's heading to Las Vegas.

The 31-year-old singer confirmed a two-year residency at Planet Hollywood Resort & Casino on ABC's Good Morning America.

Britney: Piece of Me will debut December 27, just in time for Las Vegas' massive New Year's crowds. Spears announced 16 dates, but she will perform 50 shows each in 2014 and 2015.

Spears was airlifted to a dry lake bed in the Nevada desert for the pre-dawn announcement.

About 1300 people had been bussed to the remote location in the wee hours of the morning, and were waiting for her dressed in Britney Spears T-shirts or the singer's signature schoolgirl look from her ... Baby One More Time music video.

The Grammy-winning singer's confirmation about the residency comes after much online speculation, including some of her own Vegas-themed tweets.

She said in an interview on GMA that the show will feature her greatest hits as well as new material.

"I'm definitely ready," she said in a taped interview, adding that she's training five hours each day.

Spears' helicopter hovered in the desert above her fans, who were holding giant cards that formed a 10-story-tall picture of her. The singer stepped off the aircraft and said she was feeling sick.

After a second - and live - interview with GMA, she headed back to the helicopter, barely smiling and offering little more than a wave.

A tweet about the experience later showed up on her Twitter profile.

"Y'all that will be the last time u EVER see me in a helicopter. Love u @GMA & that was INCREDIBLE but helicopters are not for this girl :(," it read.

Tickets for Britney: Piece of Me go on sale September 20. Prices range from $59 to $179.

She'll be the city's first pop music resident artist, according to Kurt Melien of Planet Hollywood parent company Caesars Entertainment, and her show "will revolutionise the entertainment landscape in Las Vegas".

The show will take place in an "intimately-sized" theater with nightclub touches, including table and bottle service.

Spears, who debuted on the music scene in 1999, has released seven platinum-plus albums. She has more than a dozen Top 10 hits, including Toxic, Gimme More and Oops!... I Did It Again.

She released a new song, Work B****, this week. It's from her untitled eighth album, due out December 3, which will include songs about her ex-fiance Jason Trawick.

- AP