Heidi and Spencer Pratt kept it causal as they sat curbside for an Independence Day parade in Pacific Palisades Monday.The reality television star, 35, and her husband, 28, took their four-year-old son Gunner to the event.Heidi, whose last name was formerly Montag, donned a light blue T-Shirt and white shorts that stopped in the middle of her thighs. Relaxed outfits:Heidi and Spencer Pratt kept it causal as they sat curbside for an Independence Day parade in Pacific Palisades MondayThe Hills star walked in comfortable turquoise and purple sneakers.