British singer Lily Allen has two good reasons to smile: 1) She’s preggers. 2) She’s got a very fetching Yves Saint Laurent Overseas bag in her possesion. The sleek gray handbag, with its unique ridged texture and signature gold chain detail, may not get as much hoopla as the Yves Saint Laurent Tribute or Downtown Totes, but it’s just as chic. It’s nice to see Lily working her fashionista mojo in this cool ...