Arnold Schwarzenegger is a man of many hats -- and heading into the weekend, he put on his wings and picked up a wand to play a musical cupid for none other than Matt Iseman.
Check out this video, obtained by TMZ, showing the former Mr. Olympia doing his best conductor work Friday out in Austria ... where he's there for a mix of business and pleasure. As you can see, he was leading a band and singing a tune, with a lot of people around.
We're told this was actually at a pre-party ahead of the Hahnenkamm Races -- a major skiing event out there that they do annually .