Even Joan Collins loves big-box stores. The “Dynasty” diva — who, as we reported, was taken out of the Vanity Fair Oscar party in an ambulance after fainting — was spotted at Target in West Hollywood, stocking up on essentials, including detergent, Evian and dog clothes, and she “looked at Oreos three times before going in for them.” Collins recently said on CBS’s “The Talk” that she shops regularly at Target — “I was there yesterday! Although you would never have recognized me.” Collins fell ill at the Vanity Fair party after wearing a too-tight dress, but we’re glad to report she went shopping in jeans, a polo shirt, boots and a white baseball cap.