Britney Spears has been sued for allegedly breaking her backing-dancer's nose during rehearsals last year.
Dawn Noel has filed a lawsuit against the 32-year-old singer after she accidentally whacked her in the face while practising for her 'Work Bitch' music video at a studio in Woodland Hills, Los Angeles, on August 19, 2013.
Ms Noel claims the 'Hit Me Baby One More Time' hitmaker arrived two-and-a-half hours late for rehearsals "in a dishevelled and confused state".
She went on to state the choreography for the dance was "fairly basic", but Britney appeared to be having "difficulty learning the moves and following simple directions."
Ms Noel claims she was standing to the side of Britney when the star "twirled in an unbalanced and reckless manner, arms extended out to her sides and forcefully backhanded" her square across the face.
The lawsuit, obtained by E! News, alleges that there was a "cracking sound", known immediately to be Ms Noel's nose, that was heard by other dancers.
Britney allegedly said sorry after the incident, before continuing with the dance routine.
Ms Noel sought medical advice half an hour later and was told she had a nasal fracture that would require surgery.
The lawsuit states that Britney and Reign Deer Entertainment agreed to pay for the medical bills, but Ms Noel was informed months later that wasn't the case.
Ms Noel is suing for serious physical and emotional damages and is demanding a jury trial.

Justin Bieber has sparked rumours he's dating a model.
The 20-year-old hunk was spotted getting cosy with Yovanna Ventura, 18, yesterday (05.05.14) as they rode in a rickshaw through Venice Beach, California.
The pair were seen acting "like a couple" on the beach boardwalk, where they "had drinks and snacks", before Justin drew even more attention to himself by putting his hand on Yovanna's thigh while they rode the bike.
A source told E! News: "Their relationship is blossoming. I wouldn't be surprised if they have now started dating."
The duo have known each other since March after the stunner caught Justin's eye on Instagram and he reached out to her, before meeting her a few weeks later in Miami.
The source added: "It's been killing her she couldn't tell anyone about him. Meeting Justin has been exciting for her."
It appears the feelings are mutual as the 'Baby' hitmaker reportedly enjoys her company and likes talking to her.
The source explained: "Justin really likes her. I think he really enjoys being around her. She is just such a genuine person and he likes to talk to her."
However, the news that Justin's found himself a new love interest might not go down well with his former flame Selena Gomez, whom he has been dating on/off for three years, as she reportedly "flipped" out last month after the star was getting too friendly with her pal Kylie Jenner.

Emma Roberts' family hoped she would grow out of acting.
The 23-year-old star - whose auntie is Julia Roberts - admits her relatives didn't want her to pursue a career in showbiz and wanted her to become a doctor instead.
Speaking in the June issue of Elle Canada magazine, she said: "She [my mum] just didn't want me to go into it [acting] young. When you come from a family that's in the industry, they're always like, 'Be a doctor! Be a lawyer!' But we end up wanting to be actors."
When asked if she received any advice from Julia, she added: "No one said anything to me about acting because they hoped it would just be a phase. But I kept doing it!"
The blonde beauty - who shot to fame after taking on the lead role in the TV show 'Unfabulous' - believes her determination to follow her own dreams comes from being raised single-handily by her mother Kelly Cunningham.
She explained: "I've always been very opinionated. That's what comes from being raised by a single mother. My mum always instilled confidence and told me to have an opinion and to educate myself."
However, Emma - who's engaged to Evan Peters, believes she lets herself down because she's a procrastinator.
She said: "I'm such a procrastinator. I put off cleaning. I'm not really messy, but it's organised chaos."

Adam Levine will get "rid" of his platinum blonde hair before his wedding day.
The Maroon 5 frontman ditched his brown locks for an eye-catching peroxide blonde style last week and, although he likes his new do, he insists will dye it back before he ties the knot with his fiancée Behati Prinsloo later this year.
Speaking to 'Access Hollywood', he explained: "[I'm] probably gonna have to get rid of this before [the wedding] happens. I love my hair [but] it's not gonna be this way forever - trust me. I'm gonna have to change it back for something or other. I'm enjoying it."
The 'Voice' USA coach has faced a lot of backlash online after he posted a picture of his new look on Instagram at the weekend, but he insists he doesn't mind the negative comments because all that matters is that Behati likes it.
He said: "Behati loves it. Most people aren't gonna like it, but I'm OK with that."
The hunk doesn't even know where the idea for the change came from, but he just wanted to try something new.
He added: "I literally woke up and said I want to try something different. I'd never done it before."

Simon Cowell thinks his baby son has got his "handsome" looks from him.
The 54-year-old music mogul posted a series of cute photographs of three-month-old Eric on his Twitter account last night (05.05.14), but he made sure he took full credit for the tot's sweet smile and adorable facial features.
He tweeted a snap of Eric, peering over the sofa, with the caption: "Very handsome like his dad."
The 'X Factor' boss also assured his fans that the youngster, whom he has with his girlfriend Lauren Silverman, has been very "healthy and happy" following his birth on February 14.
Meanwhile, Simon's former girlfriend Terri Seymour recently admitted that the 'Britain's Got Talent' judge is a "really good" dad - apart from the occasional near-mishap.
She said last month: "He's great actually. I mean he hasn't changed his lifestyle because Simon wouldn't. But he's very good. He'd never even held a baby before, so he was like, 'How do you hold a baby?'
"You have to remind him every now and then about the head... But he's really good and he loves it."
"Everybody was like, 'Oh my God, this is going to be so strange' but it's all been very natural."
Although, Terri believes Simon has taken to fatherhood so well because Eric is such an "easy" baby.
She explained: "I think [baby Eric] is just so easy. I met him obviously a few times before. He's amazing, he's the most well-behaved baby.... considering he's Simon's!"

Madonna wanted to attend the Met Gala semi-naked.
The 55-year-old singer took to her Instagram account last night (05.05.14) to share a raunchy photograph of what she had planned to wear to the glamorous event in New York City yesterday, but Vogue editor Anna Wintour shot her down.
The snap showed off her barely-there ensemble, which appeared to be made of white tape that was wrapped around her breasts, although she did manage to preserve her modesty by inserting a large "censored" sign across it.
She accompanied the risqué photo with the caption: "What I wanted to wear to Met Ball but Anna said Not this year! So I'm gonna work on music instead? #artforfreedom (sic)".
Meanwhile, the blonde beauty is no stranger to shocking her fans with her bizarre shots on the photo-sharing site as back in March she posted a picture of her, standing in her sexy underwear, showing off her hairy armpits.
She wrote at the time: "Long hair...... Don't Care!!!!!! #artforfreedom #rebelheart #revolutionoflove. (sic)"
Earlier that day, Madonna posted another cheeky picture in which she wore fishnet tights and fetish-style underwear, which showed off her butt.
She captioned the picture with: "Looking for Love in all the wrong places! (sic)"
However, she subsequently removed the naughty image.

Jenna Dewan-Tatum's daughter "can't get enough" of broccoli.
The 33-year-old actress insists her 12-month-daughter Everly - whom she has with her husband Channing Tatum, 34 - has already developed a love of healthy eating as she enjoys chomping on the green vegetable at meal times.
Speaking to Us Magazine, she explained: "It sounds so crazy but this little girl loves broccoli. I don't know how I lucked out with a kid who loves broccoli. She literally can't get enough."
The brunette beauty has been creating new meals in the kitchen for her little one to try and was over the moon when Everly seemed to enjoy her infusion of ginger sauce, lentils and garlic.
She explained: "It's really fun to see her go 'Mmm that was good,' and like it because they have such a clean palette. You can sort of give them anything and decide what they like. I'm constantly being creative in the kitchen for her."
Meanwhile, the 'Witches of East End' star hasn't been able to leave the tot's side recently without her bursting into tears as she's currently going through a "mummy stage".
She added: "She wants me all the time, like, she's crying when I leave the room ... She's like really a buddy, I love taking her places with me; Going to stores with her, going to friends' houses--she just hangs out. She's literally the coolest little girl."

Jessica Alba refuses to do naked scenes because she doesn't want her grandparents to see her boobs.
The actress, 33, who has a nudity clause when filming movies, doesn't like to flash the flesh on the big screen for fear of her older relatives catching a glimpse of her breasts.
Speaking in the June issue of Glamour magazine, she explained: "I don't want my grandparents to see my boobs. That's it. It would be weird at Christmas. And, I mean, really, if you look at the movies I have done, getting naked would never 'elevate' the picture."
Meanwhile, the 'Sin City' star has been busy working on her business The Honest Company, which creates toxin-free household goods, nappies, and body care products.
And she admits she was inspired to create the organisation after spending her childhood in and out of hospital.
She explained: "That's [spending my childhood in hospital is] what really inspired me to start Honest. I had so many health issues, and come hell or high water, my kids were going to be as healthy as possible."
The brunette beauty - who has two children Honor, five, and Haven, two, with her husband Cash Warren - admits she felt really out of place as a child because she wasn't able to do the things other children were doing at her age.
She added: "My life was tough as a kid. I was so lonely. And I felt really disconnected from my friends because I spent so much time in the hospital with grown-ups, and felt like a weirdo."

Kim Kardashian has chosen her wedding gown.
The 'Keeping Up With The Kardashians' beauty is set to marry Kanye West - with whom she has 10-month-old daughter North - on May 24 in Paris and insists she's "narrowed down" her choices of dresses for the big day.
She told US Vogue: "I tried on quite a few. [Then I] narrowed it down."
Kim was recently spotted with a large shopping bag following a visit to Balmain's showroom in the French capital, sparking speculation she may have had a fitting ahead of her nuptials.
She was previously said to has chosen a show-stopping design and "beyond loves" the gown, which insiders have described as one of the world's "elite."
Balmain seems to be a favourite to curate Kim's wedding look after growing closer to designer Olivier Rousteing in recent months, posting numerous photos of her hanging out with him on Twitter.
Kim, 33, and Kanye, 36, who got engaged in October, allegedly tied the knot in a private ceremony in Los Angeles this weekend after securing their marriage license last week.
They were forced to legally wed in California before their romantic bash in Paris after it was revealed the French law requires a strict 40-day residency before they can get married in the country.
Meanwhile, the screen beauty was spotted at the Met Gala with her fiancé last night (05.05.14) where she opted for a blue Lanvin piece with her long hair swept to the side.

Kelly Osbourne thinks it is "insane" someone has paid $20,000 to have dinner with her family.
The showbiz clan - rocker Ozzy Osbourne, his wife Sharon and their children Jack and Kelly - donated a family meal for an auction at the Race to Erase MS gala event at the weekend, and the 'Fashion Police' host can't believe how much their lot raised for the multiple sclerosis (MS) charity.
Kelly wrote on her blog: "Can you believe that someone bid $20,000 to have dinner with my family???? That's insane but thank you thank you thank you whomever you are, I can't wait to have dinner with you!!!!! It's going to be a fun one so get prepared... YOU HAVE BEEN WARNED!!!! (sic)"
Kelly herself also got involved with the auction, winning a bidding war against her brother - who suffers from MS - for a vacation in Mexico, for which she paid $6,000.
A bespoke Aston Martin Vanquish - which was commissioned by the Osbourne family - attracted the highest bid of the night, selling for $230,000.
As well as the auction, which was hosted by Jack and Howie Mandel, guests at the Hyatt Regency Century Plaza hotel in Los Angeles were entertained with performances by Steven Tyler, Cee Lo Green and Natalie Cole, while Jordin Sparks was among the speakers.
The annual event raised $1.75 million dollars for Race to Erase MS and its Center Without Walls programme, a collaboration of top MS research centres working together as a team on ground-breaking research to treat and ultimately find a cure for the disease.

Justin Timberlake loves trying new things.
The 33-year-old singer and actor believes it is important to learn from everything he does, so knows if he starts to repeat himself, it's time to do something different.
Speaking on the new season of 'Oprah's Master Class', he said: "If I'm not learning from something that I'm doing, then that means I've done it before. Do something different, even if it's within the same medium.
"To try new things, that makes more sense to me than making a career out of doing the exact same thing over and over and over and over again."
And the 'Mirrors' hitmaker - who is married to Jessica Biel - feels particularly excited and inspired when he embarks on a new challenge that takes him out of his comfort zone.
He added: "I like the moment where I can look at everyone and say, 'I have no idea how to do this. Let's figure it out.'
You do that with a stage performance as much as you do a character on film. That inspires me. That motivates me."
Other stars who will appear on the new season of 'Oprah's Master Class' include singer Lionel Ritchie, actresses Whoopi Goldberg and Sharon Stone, and 'Fargo' star Billy Bob Thornton.

Jon Hamm admits working on porn movies was "soul-crushing".
The 'Mad Men' actor was a set-dresser on softcore adult movies in the late 1990s and says it was one of the worst jobs he'd ever had.
Discussing a recently resurfaced episode of 'The Big Date', which he appeared on in 1996, he said: "I was actually at that time working as a set dresser for Cinemax soft-core-porn movies. It was soul-crushing."
Jon's career has come on massively in recent years and he doesn't think he'll ever get a better job than playing advertising boss Don Draper in 'Mad Men', which will come to an end after its current seventh season.
Speaking to the new issue of Vanity Fair magazine, he said: "This is the best job I've ever had and maybe ever will have in my life--it's so fun to play all of this. It can be relentlessly dark. It can be terribly sexually inappropriate, is a way to say it. But who else gets a chance to do any of that stuff? There's so much there."
Jon is also heavily involved with the plotlines of the drama, with show creator Matthew Weiner admitting he knows "everything" that is going to happen and the writers often go to the actor for suggestions when they get "stuck".
Matthew said: "He knows everything. He's the first, outside the writers' room. I try stuff out on him.
"When we get stuck in the writers' room, I go down there and have a conversation with him."