A Keith Urban hologram has been unveiled in Sydney.

The computer-generated likeness of the singer performed in the city's Pitt Street Mall today (10.07.14), and fans were able to interact with it and even have their own jam session with the 46-year-old star.

The hologram - which was created using the same technology that saw a virtual Michael Jackson perform at the Grammy awards earlier this year - kicked off the day by addressing the crowd.

Virtual Keith said: ''Thank you, thank you. Alright I'm going to play for you first, and then a little bit later we'll try something very cool.

'' ... Alright this first one is called 'Somewhere In My Car'.''

He then performed his new single, before fans were given the chance to ''chill or rock'' with him, with the audience given a choice of instruments including guitar, harmonica, tambourine or drums.

Sammy Vincent, 33, from Hurstville, was one of the first to perform with the hologram.

He told Australia's Daily Telegraph newspaper: ''It's always exciting, it was nerve-racking. It's a great way to interact.

''I'm a massive fan of him.''

Sammy - who could only see the hologram on screens - said it was a ''weird and wacky way'' to interact with the 'American Idol' judge.

He added: ''But its most enjoyable really.''

The Keith Urban experience was part of a partnership between the musician and ANZ bank to promote their latest app Grow by ANZ.