I'd scream. Not of exitement, because I'm scared my house gets the Uglyness-Virus! Then I would kick his imagination-balls and THEN I call the cops and say that he attacked me and I just defended me. Then he gets arrested. Oh wait...Babys can't get arrested!!! Too bad... (my face would look a little like this XD)
The warrior in me would kick in (well...my warrior never actually leaves :D) and I would karate chop him in the throat and kick him in the teeth. The I would just plain scream in his face until he left.
After he left I would treat myself to a hot cocoa, even though it's August.
This would be my reaction. "GET THE HELL OUT OF MY HOUSE আপনি CREEPER! JUST BECAUSE YOUR DUMB SONGS ARE PLAYED ON THE RADIO EVERY SO OFTEN DOESNT MEAN আপনি CAN COME IN MY HOUSE! LEAVE অথবা I'LL FILE A RESTRAINING ORDER!" Yup.
ব্যক্ত hi with a kind way... and when i shake his hand, i flip him over and then scream "HOW DARE আপনি COME TO MY HOUSE!!!!!!!!!!!! আপনি ARE NOT WELCOME HERE!!!!!! আপনি EVEN NOT CLOSE TO BE A SINGER!!!!! AND IF আপনি DARE TO SING AGAIN, আপনি WILL END UP DEAD!!!" after that, i kick him in his you-know-what. :)