Sam Faiers and Lucy Mecklenburgh are no strangers to confrontation having starred in one of the most dramatic reality shows on TV.
But the ex The Only Way Is Essex stars appeared to have ignited ancient angst with a new feud over Twitter.
Sam, 24, launched her own health and fitness website- Celebrity Training With Sam Faiers- at the start of the month.
The site offers workouts and diet plans to fans of the ex-Celebrity Big Brother star.
Lucy Mecklenburgh, on the other hand, has forged her own career as a fitness expert.
The 24-year-old launched fitness company Results With Lucy last year and has even brought out her own specialist book.
It appears that the former friends have now become fierce competitors, with Lucy allegedly blocking Sam on Twitter!
A friend of the stars told heatworld: “Sam’s and Lucy’s Twitter handles were both tagged in a tweet by a follower, but when Sam’s team, who run the account with Sam, went to reply, they found that Results With Lucy had actually blocked them.”
Though the pair were once both good friends, the girls’ relationship ran into difficulty when they fell out over former TOWIE star Mark Wright, who has been linked to both women.
Sam Faiers' life in pictures
From her dramatic relationship with Joey Essex to her battle with Crohn's disease- TOWIE babe Sam Faiers' life in pictures
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Sam entered the Celebrity Big Brother house in January 2014, just after she turned 23.
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Sam's mum, Sue, suffered at the hands of her ex-husband and Sam reportedly remembers her dad trying to strangle her mum.
3 of 29Samantha Faiers was born in Brentwood Essex on New Years Day in 1991 to Sue and Lee Faiers.
4 of 29Sam is just 1 year younger than big sister, Billie.
5 of 29Sam’s dad got in a bit of bother when he was arrested for plotting to steal £1.1 million in gold and silver bullion.
(Sam and Billie- centre- pictured with mum Sue and Aunt Libby)
6 of 29Did you know Sam is married!
The TOWIE star got married at the age of 7! ‘I We got married one Saturday afternoon at a friends house… There was no divorce- Wayne and I just grew apart, I guess.’
7 of 29Sam started at Shenfield High School in Essex, where she met fellow future TOWIE castmate Lucy Mecklenburgh.
8 of 29Sam enjoyed school and says she had loads of mates. ‘We were the popular girls in school. We called ourselves the seven sexy cinders.’
9 of 29Sam’s been wearing fake tan since the age of 14.
‘When we started getting into it, we got 100 per cent into it, and keeping up our tans became a really important thing.’
10 of 29Did you know the Faiers girls moved to Spain?
The girls lived in sunshine for 5 months before the family decided that Spanish life wasn't for them- Sam remembers missing her friends and not enjoying her international school's strict rules over make-up.
11 of 29Sam’s first boyfriend was a lad called Harry Lonergan ‘a snog and a bit of hand-holding was as far as it went.’
She lost her virginity to boyfriend Frazer Parrish when she was still at school.
12 of 29The second person she slept with was Mark Wright when she was 16.
13 of 29Sam first appeared in The Only Way Is Essex alongside Mark and pal Amy Childs.
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Sam worked in a bank when she left school, but chose to pursue a career in glamour modelling when she was 18.
The star posed for the likes of Nuts, ZOO and Daily Express.
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The first series of TOWIE saw Sam and co-star Lauren Goodger compete for the affections of lothario Mark Wright.
16 of 29Sam and Mark's on/off girlfriend Lauren were never very friendly...
Sam said about Lauren in her 2012 autobiography: ‘Despite all her efforts, she never seems to get things quite right. Her outfits and appearance are never quite there, and the way she acts, its like she has a permanent chip on her shoulder. She’s not a girl’s girl.’
17 of 29Sam met Joey in a nightclub in London, but they didn't start dating until series 2 of TOWIE.
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Sam wasn't sure if she was ready for the relationship. ‘I don’t suppose I ever thought it would last- he is too young, and I was still moving on from Mark.’
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Sam and Joey went 'glamping' for their first date.
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Sam and Joey got engaged in Dubai last year but dramatically split just a few months later in Marbella.
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Sam then had to watch ex-fiance Joey fall into the arms of leggy model Amy Willerton in 2013’s I’m A Celebrity Get Me Out Of Here
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She became close to Made In Chelsea’s Ollie Locke, but their budding romance failed to take off once the show had finished.
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Sam became ill in the house with a mystery illness and producers were forced to seek medical attention.
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She was admitted to hospital when she left the show after saying in a TV interview that she had ‘never felt so ill in my adult life.’
25 of 29Sam underwent tests and was eventually diagnosed with Crohns disease.
She gave her first TV interview following her diagnosis. She told This Morning’s Holy Willoughby and Phillip Schofield: ‘I'm on tablets at the moment, for the next three weeks I'm on shakes, which will give my bowels a rest for six weeks.’
26 of 29Sam has now returned to our screens for TOWIE series 11
We wonder what the future has in store for everyone's favourite Essex girl!
27 of 29Read on to find out everything you need to know about Sam Faiers...
Find out how Sam Faiers went from teenage lipgloss junkie to fully fledged TOWIE babe.
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Sam’s parents split up when she was very young, and her mum then married her stepdad David Chatwood.
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Sam made Joey wait 5 weeks before she slept with him. She revealed: ‘he just seemed inexperienced, and it wasn’t amazing.’