VIDEO: Who Made K-Cav Laugh To The Point Of Tears?

This guy (left). Canada-based journalist Paul 'The Intern' Lemieux recently chatted with "Hills" star Kristin Cavallari in a hilarious James Lipton-esque Q&A called "One on One," and he managed to catch the ballsy lady in a rare moment -- laughing uncontrollably! So just how did this regular ol' dude get the Queen Bee to giggle that much?

You MUST check out the video below. Something tells us that K-Cav wasn't really prepped for this interview, making it that much more authentic (and amazing). Her laughter is contagious, which is something we never thought we'd say about the infamous catfighter.