Bradley Cooper and Irina Shayk made things official this week, partying as a couple alongside the likes of Karlie Kloss and Lara Stone at L’Oréal’s Red Obsession Party in Paris. Elsewhere in the City of Lights, Selena Gomez, Jaden Smith, and Hari Nef turned up for Paris Fashion Week. Back in the States, Lady Gaga felt a chill, taking the Annual Polar Plunge in Chicago. In L.A., Jennifer Lopez and Queen Latifah got tight at a film premiere and Brett Ratner planted a kiss on Mariah Carey, while Emmy Rossum cozied up to a kitten in New York. Click ahead to see those highlights and more from this week.