Back in April, two American priests studying in Italy hit the stage in Rome for a must-see dance-off [1] that's now gone viral. During a fundraiser at the Pontifical North American College near the Vatican, 29-year-old Rev. David Rider of Hyde Park, NY, showed off his tap-dance skills, and the crowd erupted in cheers. Soon it became a true dance-off when 28-year-old Rev. John Gibson of Milwaukee, WI, joined him on stage to do some Irish dancing. Watch the impressive dance-off above and then check out more must-see viral videos [2], including some awesome dance videos [3]!