Orlando Bloom -- Loves Plus Size Models ... Or Questions About Them (VIDEO)

Orlando Bloom put on a Gregory Hines-esque performance -- tap dancing like a total pro when we asked the legendary lady slayer about banging curvier girls ... and the video is awesome.

Just watch ... Orlando was walking out of Giorgio Baldi Tuesday night, and our camera guy fired off the question: "Would you date a plus size model?"

Miranda Kerr's ex reacts immediately, and eventually does respond ... sorta. Seriously, it's freakin' classic.