London, May 17 : Cover Drive singer Amanda Reifer has challenged pal Rihanna to a "Booty Olympics".

The 21-year-old Bajan beauty dared her raunchy compatriot after performing a Biz Session.

"We should do the Booty Olympics and stand in a line to see who wins," the Sun quoted Reifer as saying.

"We could have a shaking part and a standing still category!" she said.

The singer reckons there's something special about Caribbean girls.