Ever since Lady Gaga and Bradley Cooper's Oscars duet, people (and by "people" I mean "strangers who have never met either of them") are pretty sure that Mother Monster and Sir Dreamy Eyes are in love. Gaga did her best to quash this theory on "Jimmy Kimmel Live," insisting that she and Cooper are just really good actors. Sure thing, STEFANI. Below are a handful of tweets that sum up the big question: "Are they? Aren't they?"