Erin Jayne Plummer's bittersweet last Instagram post: TV infomercial host said it was 'so good to travel again' during a work trip to New Zealand just weeks before her 'sudden' death

Erin Jayne Plummer's final Instagram post showed the popular TV presenter enjoying work and travel after two years of Covid restrictions.

The Studio 10 and TVSN infomercial host shared several photos on April 22 of herself with a television sales team on set in Auckland, New Zealand.

Erin, who died 'suddenly' at the age of 42 last week, captioned the post: 'TV shoot in Takapuna NZ. Great fun on set and so good to travel again. Cut!' 

She also posted a photo of a picturesque beach in Takapuna, the suburb on the North Shore of Auckland where she was working. 

Other images showed Erin in a hi-vis vest in a warehouse, and sitting with the crew of her latest infomercial shoot.

A private memorial service was held for Erin at Sydney's Freshwater Beach early Wednesday morning.

Mourners were encouraged to enjoy a coffee and red frog lollies in remembrance of the late TV personality, who was a fan of caffeine and sugary sweets.

Studio 10 hosts Sarah Harris and Angela Bishop announced Erin's death on Monday's show, describing her as a 'gorgeous human inside and out' and a 'gold-medal mum' to her three daughters.

Her cause of death is unknown.

Erin was also a presenter for Aerobics Oz Style for six years. The instructional aerobics TV series, which aired from 1982 to 2005, had a global audience of 40 million people at its peak and was broadcast in more than 80 countries. 

But it was her role as a professional spruiker for which she was best known.

During her career hosting advertorials, she appeared on Studio 10, TVSN, Mornings with Kerri-Anne and The Morning Show, and earned the nickname 'The Danoz Girl'.

In addition to her TV career, Erin was an accomplished synchronised swimmer who represented Australia at three world championships and won 11 national titles. 

A sombre Sarah Harris said: 'We've got some really sad news to share this morning.

'Over the weekend, Studio 10 lost a bit of its sparkle with our friend and advertorial host Erin Jayne passing away suddenly.  

'For two decades, Erin has been a friendly and familiar face on Australian telly, and for a lot of that she's been brightening up our mornings with her bubbly personality and megawatt smile.

'Erin was just a gorgeous human inside and out, and if it wasn't for TV, perhaps Erin may have had a sporting career. 

'She represented Australia in synchronised swimming and even surf life saving, and there's no question that Erin Jayne was a high achiever, and certainly a gold-medal mum to her three young girls.' 

She concluded: 'We'll miss your sunshine around the studio, Erin Jayne, and all of us here are sending lots of love and strength to her family. You'll be very missed.' 

A GoFundMe page has been set up to support Erin's family, and has already raised $23,990, far surpassing the initial goal of $5,000.