To fans, she's the Yellow Wiggle.
But in the remotest part of Arnhem Land, Emma Watkins is being hailed as the "golden girl of sign" after a $20,000 donation to "protect and share one of Australia's first languages" - a rare and remarkable Indigenous sign language.
Watkins donated money to a project to produce and distribute a book of thousands of photos illustrating 500 of the most common signs, used by hearing and non-hearing people for thousands of years, before they become extinct.
The GoFundMe page to preserve the language was launched by anthropologist Dr Bentley James, who has been living and working with Indigenous elders for nearly two decades to learn the language, understand the culture and document it.
"We are tickled pink by the big-heartedness of the golden girl of sign," he said.
Because of Watkins' generosity, the project has now exceeded its goal and raised nearly $46,000 to fund the guide. Dr James said there is now the possibility of a wider distribution to hospitals, deaf schools, universities and libraries, plus a smartphone app.
"(They) are all now real because of the golden girl, the giggle, the Mary Poppins of Yolngu Hand Sign," he said.
More than 90 per cent of the 250 Indigenous languages that existed across Australia before colonisation have disappeared, most without recordings or documentation.
Used by hearing and non-hearing people for thousands of year, Yolgnu sign language (YSL) is a parallel and universal language - a lingua franca.
It has allowed speakers of different dialects in remote north-east Arnhem language to communicate when hunting, mourning (when talking is discouraged) and to conduct sensitive business or communicate across distances.
Like many people, Watkins was surprised to read about this sign language in an article in the Herald last month.
"We were taught about the Dreamtime, but I didn't know there was this sign language," she said.
She knew about a similar sign language used in Martha's Vineyard in the United States, but was amazed to discover a much older language being used in her own country.
Watkins said using photos to illustrate each sign, showing the facial expression and the movement of their bodies, was important, because it conveyed the emotion.
"Sign language isn't only the sign," she said.
On and off the stage, Watkins is "immersed in the deaf community". She starts every Wiggles show by signing her name, and signs during some dances.
The colourful four have also done several performances where young people have signed the show.
Watkins is undertaking a doctorate in sign language at Macquarie University and has been learning Australian sign language (Auslan) since she was a girl.
As a child growing up in Sydney, the Yellow Wiggle's best friend's two brothers were deaf. She'd accompany their family on visits to the RIDBC Thomas Pattison School.
In a video with the Deaf Society, she remembered playing hide and seek and "stamping on the ground" so the boys could feel what was happening.
Her doctorate is exploring different ways to make music and dance videos more accessible to people who are deaf or hearing impaired.
For instance, she is examining how to include a metronome ticking on-screen to show tempo, the number of beats per minute.
Watkins said it would be wonderful if more schools would teach sign language to hearing children.
"It was useful for everyone. If a deaf person was in a car accident, it was easy to ask their name or if they needed a doctor," she said.
"Even learning the first 60 signs would enable most people to communicate the basics."
Dr James said Australia was leading the world in the destruction of Indigenous languages. "We have no idea how many we have lost, but we will save this one," he said.