Heidi Klum Seal sunglasses tee shirt camera

Spotted: Singer Seal and his preggers model wife, Heidi Klum, taking a stroll through Bev Hills on Sunday and drinking Britney Spears' fave beverage...

Our photogs tell us that Seal was the perfect gentleman, opening the door for her and everything. Aw! Their marriage seems as solid as Gwen and Gavin's. Moreso, even!