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Taylor Kinney, who plays Mason Lockwood on the CW series 'The Vampire Diaries,' stars in Lady Gaga's 2011 music video for her song 'You and I.' In December 2011, celebrity photographs that showed the two walking together, with his arm around her, in California sparked dating rumors. They have not commented on the nature of their relationship.
(Pictured: Lady Gaga and Taylor Kinney appear in her 2011 music video for 'You and I.')