Steven Alan's Flannel Ruffle Shirt [1] ($163) exudes a comfy and quirky vibe, hence why Mary-Kate Olsen got her hands on it and wore it while chillin' on the streets of NYC. (Natalie Portman [2] also wore the shirt recently.) Our friends over at Rarechic are nice enough to provide a 15 percent discount on any item for FabSugar readers. Just enter Happy2008 at checkout. Side note: Doesn't MK look like Meg Ryan [3] here? Trippy.

Source [4]