'Twas the Oscars performance heard 'round the world. Lady Gaga and Bradley Cooper's sizzling duet seemed to confirm what fans have been hoping for since seeing A Star Is Born: these two are totally in love. We mean, we've all noticed the way she looks at him. Seeing as Bradley is currently in a (happy?) relationship with model Irina Shayk, skeptical celebrity watchers have reminded the doting public that they are actors, after all. Nevertheless, it certainly wouldn't be the first time co-stars have felt the sparks fly off-screen.

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