Martha Stewart attends Louis Vuitton bash after her prison bestie accused her of 'betrayal'

Martha Stewart continued soaking in the spotlight as she attended a party marking Louis Vuitton's latest brick and mortar.

The lifestyle icon, 83, was among a host of stars celebrating the opening of the label's new store on 57th Street in New York City on Thursday evening.

Martha looked as chic as always in an olive green coat adorned with gold buttons, shimmering trousers and metallic platform heels.

She made a nod at the celebrations with her dainty Louis Vuitton handbag.

Martha was spotted arriving to the bash on the arm of a friend and with a huge smile on her face.

The outing comes after Martha's former prison bestie Lisa Guarino lifted the lid on their friendship during their stints behind bars - before the star allegedly turned her back on her.

20 years after they shared prison walls and meals together, Guarino, once known as 'Boston's cocaine queenpin' has revealed how Stewart has since turned her back on their friendship – and an alleged promise of financial support – in an exclusive interview with DailyMail.com.

Guarino, whose 4ft 11in build earned her the street name 'Little Italy', was serving time for possessing and intending to distribute more than five pounds of cocaine.

Stewart, meanwhile, had just been convicted of four counts for her role in a stock trading scandal. She was found guilty of conspiracy, obstruction of justice, and two counts of making false statements to federal investigators. She was sentenced to five months in prison.

Guarino says she took Stewart under her wing, helping her adapt to prison life, and even preparing meals for her using smuggled kitchen supplies.

She described their friendship at length with DailyMail.com, and revealed how she even helped save Martha after the star accidentally walked in on inmates getting intimate, infuriating one of them.

Since she was freed in 2006, Guarino's life has not been as easy as Stewart's. She has faced multiple health battles over the years, and in 2015 was diagnosed with lymphoma and leukemia for which she is not currently undergoing treatment.

She lives on limited social security and says she is forced to make up the difference each month by 'begging, borrowing, or stealing'.

Stewart, meanwhile recently celebrated the release of her new Netflix documentary, 'Martha' – which mentions her stint in prison.

During their prison stint, Guarino claims, Stewart had expressed being 'grateful' for her help and guidance.

So much so that Stewart told her family during a prison visit she would give her $1million upon release – a promise, Guarino says, Stewart has not kept.

'She told my family they no longer needed to put money on my books because she was going to take care of me,' she says.

But after transferring to another facility, Guarino discovered her account empty.

'I could've killed Martha when I found out she didn't keep her word. She told my family they no longer had to put money on my books because she was going to take care of me, but she gave me a donut, a big fat zero,' she says.

'I then had my phone privileges suspended for three months so I couldn't ask my family for money. It was hell and I suffered in part due to Martha not keeping her word.'

The chain-smoking, diminutive Guarino now lives in a one-bedroom, $1,900-a-month apartment outside of Boston, unable to work because of her medical condition and survives on $600 month in social security.

Hopeful for a reunion and for her former prison pal to make good on her promise after two decades, Guarino attended a November 11 event at the Chevalier Theatre in Medford, Massachusetts, where Stewart was promoting her 100th cookbook.

DailyMail.com was there to witness Stewart arrive and wave at fans while Guarino attempted to get her attention, calling out her name and even making eye contact.

At one point she yelled out, 'Martha, it's Lisa!', yet, Stewart, who was easily within earshot, appeared to ignore her calls and quickly averted her gaze, before slipping into the theater.

Following her appearance, Stewart left through a side exit, bypassing the waiting crowd.

Speaking to DailyMail.com, Guarino said: 'Martha blew me off after I saved her life in prison. 'She jumped the fence to not have to look at me or say something to me and ran off.

'I'm pissed off, I'm offended.'

Reflecting on her experience, Guarino says she feels more pity than resentment for Stewart.

'I believed Martha when she told me in prison that we were friends, but I guess when she got back into her world, she went back to her old narcissistic ways.

'She has all the money in the world but part of me feels sorry for her.

'At least I have my family.'