Delta Goodrem and Casey Donovan perform at the Australia Day concert in Sydney 

Delta Goodrem and Casey Donovan wow the crowd as they perform at the Australia Day concert in Sydney

Australian superstars Delta Goodrem and Casey Donovan treated music lovers to an exciting set on Tuesday.

The singers wowed the crowd as they both performed at the Australia Day concert at the Sydney Opera House.

Delta, 36, shimmered in a sequinned green and silver dress as she performed her hit songs.

Performance: Delta Goodrem (pictured) and Casey Donovan wowed the crowd as they performed at the Australia Day concert in Sydney on Tuesday

She completed her ensemble with a pair of silver strappy heels and wore statement earrings.

After singing several songs, Delta changed into black pants and a grey sequinned top as she performed with her boyfriend Matthew Copley.

 Matthew wore black pants and a black buttoned shirt as he played a guitar on stage.

Impressive! Delta shimmered in a sequinned green and silver dress as she performed her hit songs

Impressive! Delta shimmered in a sequinned green and silver dress as she performed her hit songs

Duet: After singing several songs, Delta changed into black pants and a grey sequinned top as she performed with her boyfriend Matthew Copley

Duet: After singing several songs, Delta changed into black pants and a grey sequinned top as she performed with her boyfriend Matthew Copley

Delta and Matthew confirmed they were dating in January 2018, but have kept their romance under wraps. 

Meanwhile, Casey showed off her vocal ability in her on stage performance.

While performing, the former Australian Idol star looked stylish in leather pants and a black shirt.

Singing: Meanwhile, Casey showed off her vocal ability in her on stage performance

Singing: Meanwhile, Casey showed off her vocal ability in her on stage performance

She completed the ensemble with a pair of strappy black heels and also wore a black bracelet.

Casey’s performance comes after Woman’s Day magazine claimed the singer is now in a relationship with hospitality manager Jade Sharp. 

An insider said the romance has given Casey ‘a new lease on life’ after she was cruelly catfished by her former friend for six years.

Style: While performing on stage, the former Australian Idol star looked stylish in leather pants and a black shirt

Style: While performing on stage, the former Australian Idol star looked stylish in leather pants and a black shirt

Final touches: She completed the ensemble with a pair strappy black heels and also wore a black bracelet

Final touches: She completed the ensemble with a pair strappy black heels and also wore a black bracelet