Jaime Kennedy is this guy
and his show is called The Jaime Kennedy Experiment. Comes on on Sundays at 8pm on the WB.
Anyway, he basically goes out with people that dont know he is a host of this show and plays a complete idiot. Like, lets say, he goes out with this girl on a date and acts like a goofball/nerd and they are showing all of this on camera- you get the picture. Its like candid camera