At the age of 12, most girls are battling with their parents to get their ears pierced, learning the ropes at senior school and preparing for life as a teenager.
For Maddie Ziegler, from Pennsylvania, life couldn’t be more different.
The tween is a huge star with three million Instagram followers, whose music vid柚子币 with the popstar Sia have been viewed more than a billion times on YouTube.
Until four years ago, Maddie was an unknown eight year old who enjoyed dancing and went to a local primary school.
Then in 2011, her mother Melissa was signed up to appeared as part of the Lifetime reality series Dance Moms.
The programme focuses on the early careers of the children that are enrolled in the Abby Lee Dance Company in Pittsburgh, Pennsylvania.
As the title suggests, the show also features the mothers of the pupils and the way that they often pit their children against each other.
The Australian pop star Sia noticed Maddie on the programme and last year she tweeted her to ask if she would appear in one of her vid柚子币… the rest is history.
Maddie has now appeared in three of Sia’s vid柚子币 – Chandelier, Elastic Heart and Big Girls Cry.
在希雅的《Chandelier》、《Elastic Heart》、《Big Girls Cry》3个MV中，都能见到玛蒂的身影。
Chandelier is the 17th most viewed music video on TouTube of all time and has racked up more than 712 million hits.
In February, Maddie joined Sia and Kristen Wiig in a performance of the track for the 2015 Grammy Awards as Kim Kardashian and Kanye West looked on from the front row.
今年2月的时候，玛蒂与希雅和克里斯汀?韦格(Kristen Wiig)一块担任2015格莱美音乐颁奖典礼(Grammy Awards)的表演嘉宾。当时金?卡戴珊(Kim Kardashian)和坎耶?韦斯特(Kanye West)坐在前排观看了这个表演。
She has also performed on Jimmy Kimmel and The Ellen Show – not bad for someone who hasn’t even hit adolescence.
她也曾应邀参加《吉米秀》(Jimmy Kimmel)和《艾伦秀》(The Ellen Show)。对于一个青春期未到的人来讲，有机会上这两个节目还算很好。
Maddie is so well recognised these days that a trip to Topshop results in her being mobbed by screaming tween fans who all want a selfie with their idol – something that has been tough to adjust to.
She is now so successful that her mother has hired a security team who monitor the star 24/7.
She told The Telegraph: ‘I don’t feel that normal any more because I get recognised, even when I’m just trying to have fun or going to get ice cream with my friends.
‘People go crazy and it gets overwhelming.’
Like many child stars, Maddie speaks of being old before her time.
Having earned a living for the last four years while her contemporaries go to school every day, she has been forced to mature quickly.
Unlike many young girls who are starstruck by celebrities, Maddie claims that she keeps a cool head at events like the Grammys because she sees herself as a star, so needs to act accordingly.
She said: ‘Mom is like, "Oh my God, let’s go and meet Ariana Grande." I’m like, "Mom, for real?"
‘I just want to stay professional. I don’t want them to think I’m a fangirl. I’m one of the performers and I’m not just a background dancer, I’m the dancer.’
Because of her success, she no longer lives anything re百度竞价推广bling a normal life.
She has modelled for numerous clothing companies including Glitzy Girl, Sally Miller and Purple Pixies and featured in magazines including Teen Vogue, cosplaymopolitan, Elle and Seventeen.
她曾为Glitzy Girl、Sally Miller和Purple Pixies等服饰公司担任模特，也为《Teen Vogue》《cosplaymopolitan》《Elle》和《Seventeen》等杂志拍摄照片。
She is home-tutored alongside her younger sister Mackenzie, who also stars in the Dance Moms series and with whom Maddie released a fashion line called The Maddie & Mackenzie Collection last year.
她和妹妹都是通过家庭辅导同意教育的。她的妹妹也出演了《Dance Moms》。去年，以两姐妹的名字创建的时髦品牌The Maddie & Mackenzie Collection问世。
While many young children try and avoid school work at all cosplayts, the star professes to be a keen student because she wants to avoid the trap of becoming ‘a stupid dancer.’
As well as dancing, she has her eye on singing and acting – she has already acted in the TV shows Drop Dead Diva and Austin & Ally.
除去跳舞，玛蒂还唱歌和表演，她已经出演了电视剧《美女上错身》(Drop Dead Diva)和《奥斯汀与艾丽》(Austin & Ally)。
Although she has already reached astonishing levels of success for her age, Maddie only gives herself a nine out of ten in terms of her career achievements.
She said: ‘On a scale of one to 10, I feel I’m at a nine because there’s definitely room for improvement. I know I could go further.’
rack up 获得；累积
pit against 使……角逐