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Pop idols can come and go quicker than you can say Simon Cowell.

But you can't accuse Japan's latest girl group of not having longevity.

KBG84 – a play on teeny boppers AKB48 – have an average age of 84.

The pensioners have played to sell-put crowds on a nationwide tour and have now been offered a record deal.

(Image: Getty)

“When I first heard someone call us ‘idols’ I thought an idol meant someone who had lived a long life and was at the gates of heaven,” pint-sized diva Tomi Menaka, 92, told AFP.

“But in Tokyo they told me it was an entertainer – which was a relief because I thought it meant I was on my way to heaven."

The 33-strong group of singers and dancers hail from the island of Kohama in Okinawa and released a single called 'Come on and Dance, Kohama Island', with a heart-warming video shot on the tiny honeymoon isle, which has a population of just 600.

Okinawan islanders have one of the highest life expectancies in the world, their diet containing more vegetables and less sugar than that of mainland Japanese, the staple food the purple-fleshed local sweet potato rather than rice.

Menaka, a queen bee of the group, which has a minimum age requirement of 80, stays fit by doing housework. But she is not particularly fussy about her diet.

Watch the band in action:

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Eldest member, 97-year-old Haru Yamashiro, said: “I look after my health by cleaning my home, wiping the floors, steaming rice.

"I stay in the shade when it’s too hot. I don’t want to tan. I have to take care of my skin – I’m still young at heart!”

Although stardom beckons life at home is still much the same for the women, who enjoy gossiping over cups of tea.

Nature is a strong theme in their songs, which contain lyrics about whales in the sea spouting or dolphins doing somersaults.

Beats listening to Justin Bieber.