Squeaking in front

You all know how much plastic is on the front end of a Civic Si. Up around 55-70 mph, there's a plastic on plastic sounding squeaking going on that gets in your head and rattles around. Any ideas where to look first? I've checked all the screws on the bottom, and they're tight. Help! :banghead:

check the front lip

I've checked the bolts and screws all along the bottom, and they're all tight. Are there more I'm not seeing?