Kristen Stewart kept her hoodie and sunglasses on as she made her way through the airport in Buenos Aires, Argentina, earlier today. She proclaimed her love for facial hair in an "I Heart Mustaches" t-shirt, possibly making a playful statement about the scruff her Twilight costar Robert Pattinson's been sporting lately. Kristen had Rob's company last month when he visited her in Toronto while she was shooting On The Road with his best friend Tom Sturridge, but this time she was rolling solo.