I have a feeling that it's not so easy to make Lauren Conrad smile. If The Hills are any indication, this is one pretty tough egg to crack, but we managed to wrangle a smile when we ran into Lauren exercising in L.A.'s Runyon Canyon. She wasn't looking like she was in the mood to talk (and who would be when they're working up a sweat?), but we got her to smile when we mentioned that she keeps us in shape when we've got to run to keep up with her! I hate to say it, but Lo is looking way better every day. Anyone looking forward to The Hills next week? Pictures by Martin-Prine