Talk about a sticky situation! Us Weekly reports that two years ago, Justin Theroux found old Post-It notes from Brad Pitt that Jennifer Aniston had saved from her first marriage. “He stumbled upon old Post-It notes Brad had written,” says a source. “Sweet little Post-Its like, ‘You look nice tonight,’ or, ‘Miss you already.'” The source adds, “Jen assured [Theroux] they weren’t a big deal, but Justin wasn’t thrilled…Justin had moments of insecurity like that.” The 49-year-old Aniston and 46-year-old Theroux recently announced their separation after two years of marriage.