Lindsay Lohan proved her acting range on the set of Labor Pains yesterday, showing off her smiles and scowls. When she hasn't been on the set, it's been nothing but happy times for LL and Samantha and their friends, as the media continues to speculate about their relationship. The girls are still staying quiet, but the latest rumor is that Mark Ronson casually pronounced his sister and LL a "cute couple." You're all fine with celebrities keeping their relationships under wraps, but we wonder how much longer Lindsay can keep mum if there really is something to tell.