Kate Hudson and Matthew Bellamy arrived at the airport in Buenos Aires today. The couple spent the last few days in the Argentinian city while Matthew was there to perform with Muse. Kate's son, Ryder, was along for their fun daytime outings, which included a leisurely lunch and a stroll through an antique fair. Muse's next tour dates take them to Sao Paulo, Brazil, though Kate will have to return to LA soon to get started promoting Something Borrowed. The movie comes out in May, and one lucky I'm a Huge Fan winner will get to interview the star during the film's press junket, so stay tuned to see their adventure!