Rihanna & Eminem take the ALS Ice Bucket Challenge on stage...

During the last stop of their 'Monster' tour at Detroit’s Comerica Park last night, Rihanna and Eminem finally took the ALS Ice Bucket Challenge! “I’m from the islands, I don’t do this ice shit. This ice shit doesn’t work for me!” she wailed hilariously. 

That is, before her assistant and hair stylist emerged from backstage with a large pot of icy cold water and drenched it all over her head! Beyoncé, you're next!