The 32-year-old singer and mother-of-two is in fantastic shape; clearly the graft and rigour of the past few months have paid off as she gears up for a two-year Piece Of Me show at Planet Hollywood.
In one particular outfit - a nude bodysuit which appears to be very much inspired by her 2004 Toxic music video attire - Britney is even sporting a six-pack.
Back with a bang: Britney Spears is seen here
doing her last dress rehearsal on Thursday ahead of the opening night of
her Las Vegas residency Piece Of Me on Friday at Planet Hollywood
Looking good: The 32-year-old star is seen here in a nude bodysuit, evocative of the one she wore in her 2004 video Toxic
Make-up contouring: The mother-of-two is looking
in great shape, but seems to have got a little extra help with some
clever make-up trickery to create the illusion of a six-pack
But a decade on, it seems the Princess Of Pop might have opted for a spot of make-up trickery to give her abdominals that extra Vegas showgirl quality.
Known as contouring, make-up artists have all kinds of tricks up their sleeve to target various areas of the body to create slimming or shaping effects using clever airbrush techniques.
Flashback: Britney in 2004 music video Toxic
It's an oft used trick of VIPs who want to achieve that camera-ready look.
And while Britney's months of rehearsals have clearly toned and sculpted her body, it's quite quite possible that she is also getting by with a little help from her friends.
On Thursday, the day after Christmas, Britney was putting herself through her paces one last time.
Seen here in a series of exclusive pictures, it's apparent she has pulled out the stops in the costume stakes.
There are corsets, bikinis, sheer numbers and an array of other stomach and leg baring ensembles.
Throw into that wigs, an angel costume worn as she is lowered from the roof and of course that iconic Britney headset microphone (with those dance routines, holding one would be tricky).
Britney gave a hint of nerves on Thursday, tweeting a message to her fans along with a couple of snaps.
'I've got chills,' she wrote. 'Last dress rehearsal for friends and family before opening night tmw. #1DayTillShowtime.'
She will perform over four nights starting on Friday night before taking a month-long break. She will then return to the stage for a month of shows beginning at the end of January.
Britney will perform 24 of her hits each night and she has made sure to include many old favourites for her fans.
Centre of attention: She will be supported by a 14-strong army of backing dancers during the 100-minute show
Arise, Princess Of Pop: Britney is lowered from the roof wearing an angel outfit
On a high: The former X Factor USA judge tweeted her fans on Thursdays saying she had 'chills'
Stunning scenery: The songstress hovers in front of a blossom background, surrounded by her dancers below
Newer singles including Work Bitch and Perfume also make the cut.
Britney and her manager Larry Rudolph chose the songs together and in the recent E! documentary, I Am Britney Jean, Larry insisted the show should be a 'career retrospective'.
Check me out: Seen here in another array of sexy outfits, Britney certainly has pulled the stops out in the wardrobe stakes
Red devil: In this black and red outfit, Britney goes to the dark side with a brunette wig
He told her: 'Obviously the show is supposed to offer a career retrospective over the last 15 years.'
Britney later explained to the camera: 'It's kind of tough because the fans want a certain selection of songs and many of them want to hear the old hits. But then for me I have to keep it fresh to do the show so I have to incorporate some of the new stuff.
'I hope my fans get a personal feeling from the show and a piece of me, a piece of my soul because I am putting my heart and soul into this.’
Retro: Spears kept on the bobbed wig but changed into a black showgirl outfit with tassels hanging over her thighs
Muscled troupe: Spears was flanked by Polynesian style dancers in baggy trousers
Spears' 100-minute show will also feature a four-piece band, and 14 backup dancers.
And the singer says her new choreographers have been working her hard.
'This year I have new choreographers,' she explained. 'They're fresh and upcoming guys so their stuff is really hard. It's more rewarding after you perform something that's really hard to do rather than something that you just throw together.'
However, her team are impressed with Spears, explaining: 'Prep time is really tight but the way Britney retains choreography and picks up choreography is really fast. It's amazing how much material she is learning in such a short amount of time.'
Sassy star: Britney had her old spark back as she strutted with her hands on her hips
Calorie burner: The energetic show will certainly keep the Toxic singer in shape
Meanwhile, Britney, who has sons Jayden, seven and Sean Preston, eight, revealed she isn’t quite ready to retire yet but would love to move home to Louisiana if she decides to expand her family.
'If I happen to have another baby or something like that, I'd probably move back to Louisiana. I do miss Louisiana. I miss the people. I miss the food. I miss the way of life, how everything is really simple. There's no traffic like there is in LA It's really nice.'
Elsewhere in the documentary the star, who is dating David Lucado, opened up about her love of sex.
She said: 'I love sex. I think sex is great, but I feel a little different about it not that I'm older. Sometimes I feel like I'm 20, and then sometimes I feel like I'm 50style-
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