Celebrities may seem like they never catch common aliments such as flus, acne or cold sores, but they really do, and from time to time, they end up looking less than their usually perfect selves. Case in point – cold sores. These spotty blemishes are just unavoidable once you have the virus in your body, and there is no telling how regularly they’ll pop up. Poor Katie Holmes seems to struggle with cold sores frequently, and was photographed look all red around the month, one of her most unflattering moments ever. Here are 6 stars with cold sores on their mouth/lips.