Rihanna & Bruno Mars Perform on 'X Factor' UK

While having Rihanna sing beneath a shower of falling diamonds would have been overbudget for the X Factor UK, the Good Girl Gone Bad singer performed beneath a deluge of raindrops during the talent show's results episode on Sunday night. The shimmering effect got the point across: "Shine bright like a diamond." Check out the fantastic stage production below.

Earlier in the night, Bruno Mars also jumped onstage to sing his new single “Locked Out of Heaven,” off his sophomore album Unorthodox Jukebox, due Dec. 11. The only thing that could have made this show better would have been a duet from the two pop stars together.