Britney Spears refuels with healthy green drink after yet another day of dance rehearsals for Las Vegas residency

By Daily Mail Reporter

PUBLISHED: 00:53 EST, 29 October 2013 | UPDATED: 02:20 EST, 29 October 2013

She's been pictured looking exhausted at the end of each day as she gears up for her two-year Las Vegas residency.

And Britney Spears was no doubt in need of a pick-me-up after yet another day of punishing dance rehearsals on Monday.

The 31-year-old singer was seen looking tired as she sipped a green drink from Starbucks while leaving a dance studio in Los Angeles.

Health boost: Britney Spears looked in need of a pick-me-up as she sipped on a green drink after another day of punishing dance rehearsals in LA on Monday

Health boost: Britney Spears looked in need of a pick-me-up as she sipped on a green drink after another day of punishing dance rehearsals in LA on Monday

The pop star wore grey tracksuit pants and a baggy white T-shirt, an orange bra peeking out at the top.

The mother-of-two wore grey-and-purple trainers and scraped her hair back into a messy high ponytail.

She looked somewhat tired, and her thick black eyeliner only highlighted her drawn face.

On Saturday, Britney showed off her newly svelte figure in tight jeans and a super clingy red turtleneck as she joined ex-husband Kevin Federline at their son Jayden's soccer game.

Svelte: The entertainer showed off her slimmed down figure on Saturday at her son's soccer match

Svelte: The entertainer showed off her slimmed down figure on Saturday at her son's soccer match

The former Mousketeer's two-year residency with Planet Hollywood Resort and Casino in Las Vegas is set to begin December 27.

When Britney recently mentioned that she wanted Sean Preston to join her onstage, Federline was on the apprehensive side.

'We'll see about that won't we,' Kevin told TMZ, adding he'd approve if his son 'was like 25 years old.'

Vegas is calling: Britney's two-year residency at Planet Hollywood in Las Vegas kicks off December 27; the singer is pictured performing during her Femme Fatale Tour in 2011

Vegas is calling: Britney's two-year residency at Planet Hollywood in Las Vegas kicks off December 27; the singer is pictured performing during her Femme Fatale Tour in 2011

The wannabe rapper doesn't plan on being present for his ex's show, saying: 'Nah man, not my thing. When I'm in Vegas I'm at the craps table.'

Britney, meanwhile, has been working on her eighth studio album, titled Britney Jean, which is slated for a December 3 release.

She has referred to it as her 'most personal record yet' and counts producers Sia, William Orbit, and will.i.am among her collaborators.

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I bet if she just cut out the caloric beverages we always see in her hand, she'd be a lean machine as in her younger days

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For a second, I thought it was Cameron Diaz when I saw the teemy tiny photo on the right hand side of DM main page!!!

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Im a firm believer that who you allow into your life can sometimes affect.you physically and mentally. Britney has not had a spark in her eyes ever since she first started dating Federline. She always look drained now like Katie Holmes.

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Uh, that's not a "healthy green drink" That's a Starbucks Green Tea Frappuccino. Healthy green drinks come from Whole Foods, Tropical Smoothie Cafe and Greens & Proteins, not Starbucks!

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I like her but I don't get that 'hand dance' she is always doing

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She is hard working hands on Mom, and at the moment she has a gruelling schedule...respect!

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She needs to draw her eyebrows back on, it makes such a difference.

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That's not a green smoothie, Starbucks doesn't make them. It's a green tea frappucino and they are full of sugar.

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She looks like average American women with no makeup on. Give her a break. Go..Britney, make more sexy video, keep them coming even if you can't really sing, lol.

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she can sing, dont listen to dm articles, do your homework!!

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She's going to break again if they keep pushing her. You can see it in her face. She is about to burst into tears.

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I agree, they need to leave her alone a bit. Poor girl, I hope she is ok. She deserves a nice life, she is looking well too. I wish I could give her a hug and just be a real friend to her because God knows she needs someone looking out for her.

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sauce ... I've only recently learned a bit about Britney and seen her in interviews, and I completely agree with you. She needs a good man who will love her and make a life with her. She seems lonely and vulnerable to me and a sweet person.

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