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The two icons then sang the famous hit together and coming together at the end to hold their hands high in the air, were met with screams of delight from the Australian audience.

Relive Mariah Carey and Olivia Newton-John’s rarely heard duet of ‘Hopelessly Devoted To You’

Olivia and Barry performed 'How Can You Mend A Broken Heart' in Australia at Sound Relief in 2009

When Barry Gibb and Olivia Newton-John sang 'How Can You Mend A Broken Heart' and it was spectacular

The pair were celebrating the release of Grease on DVD in 2002 when the spectacular moment took place 24 years after they fell in love on screen as Sandy and Danny Zuko.

When Olivia Newton-John and John Travolta reunited after 24 years to sing ‘You’re The One That I Want’

Olivia Newton John's best songs

Olivia Newton-John's 10 best songs ever, ranked

The love story between Olivia Newton-John and John Travolta in 1978's box office hit movie Grease has kept audiences enraptured for over 40 years.

Did Olivia Newton-John and John Travolta ever date? When 'Grease' stars revealed what really happened on set

Elton John and Madonna waged a war of words for an entire decade.

Elton John and Madonna's feud explained: Why the pop legends fell out

The Bee Gees were composing and recording 'Tragedy' at Critera Studios, Miami in 1978 when the rare footage was recorded.

Private studio footage of Barry Gibb and the Bee Gees recording 'Tragedy' is phenomenal

Tom Cruise singing on Jimmy Fallon's show

When Tom Cruise sang on live TV and he was amazing

The Doobie Brothers On Stage 1979

Michael McDonald's 10 greatest songs ever, ranked

'Jealous Guy' sees John Lennon confessing how possessive and insecure he was about his love with Yoko Ono.

The Story of... 'Jealous Guy' by John Lennon

George Michael would consistently face disrespectful questions about his sexuality when promoting his music.

Watch George Michael admirably deal with shockingly rude interviewer who tries to out him

ABBA's best albums ranked

ABBA's albums ranked from worst to best

Sir Tom Jones was appearing on The Graham Norton Show when he recalled the incredible moment he first met Elvis Presley

Tom Jones recalls astounding moment Elvis Presley sang his own song to him the first time they met

Singers and their younger selves

These photos of iconic singers with their younger selves are incredible

Michael Bublé sung alongside his teenage fan

The moment Michael Bublé pulls 15-year-old fan on stage for incredible live duet

Many of George Michael's acts of generosity were only revealed after his untimely death in 2016

8 times George Michael stunned strangers with private acts of charity

Neighbours has paved the way for many actors to find their acting feet before going on to bigger and better things including number one singles, Oscar nominations and even Grammy Awards!

Neighbours cast then and now: Where are the soap's stars since leaving the show?

The greatest yacht rock songs ever

The 20 greatest yacht rock songs ever, ranked