They're doing their part and joining the popular trend at the same time!

During the final stop of their Monster tour, Rihanna and Eminem decided to jump on the charitable bandwagon and complete the ALS ice bucket challenge on stage in the rapper's hometown.

The two performers took turns dousing each other with freezing water after the 41-year-old rapper nominated Denaun Porter, Rick Rubin and concert cohort RiRi for their fans to see. Needless to say, their reactions, like many others, were priceless.

Check out the video to see it all unfold!