Eminem chose the sixth and final date of their tour on Saturday (August 23) at Comerica Park in his home town of Detroit to reply to Dr. Dre's ALS Ice Bucket Challenge.

At the very end of the show whilst the MC and Rihanna were walking off the stage, Eminem's hype man Denaun "Mr." Porter stopped them and reminded Eminem of Dre's challenge, which Eminem had accepted via Twitter.

Eminen sat in a chair on stage while Rihanna doused him with ice-cold water.

Afterwards Eminem issued challenges to Porter and Rihanna.

Rihanna asked the crowd: "Detroit, what you think? Should I do it? I'm from the islands. I don't do this ice shit! This ice shit doesn't work for me."

Rihanna continued to do the Ice Bucket Challenge whilst Eminem's band played Vanilla Ice's monster hit, 'Ice Ice Baby'.

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Watch fan footage of both Eminem and Rihanna doing the ALS Ice Bucket Challenge below: