Aren’t there laws against this?!

The relationship between Gossip Girl co-stars Taylor Momsen, 15, and 23-year-old Chace Crawford has fallen under the public scrunity after the young entertainers were spied sharing a passionate liplock during a holiday party in the Big Apple last week.

A Page Six spy spotted the co-stars sneak away during their holiday party at Haven on East 51st Street to steal kisses in the corner…