Although initially escorted up to exclusive bar, Limbo, which was reserved for the star entertainer, 23, Rihanna later insisted she be taken downstairs to EC, where Calvin was playing a sold-out gig.
Electric Circus promotions manager Stuart Duckworth says the sexy singer had an amazing time.
"She loved it, she told us she thought it was one of the coolest clubs in Australia. She was very surprised Adelaide has a place like it," he says.
Start of sidebar. Skip to end of sidebar.
End of sidebar. Return to start of sidebar.
"She was very relaxed, waving to people and having a few drinks with her crew.
The singing sensation kicked on until about 3am before her team of minders left the club.
Later, Rihanna tweeted: "Australia ROCKS!! Adelaide, what a night." Rihanna has been keeping a low profile while on tour in Australia and hasn't been out drinking with her entourage.