OK, maybe it's not too weird. After all, John Travolta has done one or two duets with a famous Aussie named Olivia Newton-John for a film called Grease.

But Wednesday night (Jan. 9), it was an all-dude duet as John Travolta joined Keith Urban onstage at a "Spirit of Australia" event to promote U.S.-Australia relations, the Los Angeles Times reports.

Check out the video (which has really loud audio, BTW): John's pretty good!

Keith was the announced talent, but John apparently is an ambassador for Aussie airline Qantas, so the actor was in the crowd. Other audience members urged John to join Keith onstage, and, voilà, John has his second Aussie duet partner.