‘Liam Hemsworth is officially her Miley Cyrus’ boyfriend and the couple have been dating for more than three months, according to E! Online. Liam attended Miley’s Staples Center show in LA last night. Before she performed a song from The Last Song, Miley gushed about how life really can imitate art as a makeout montage of them played behind her. ‘Miley and Liam were ‘lovey-dovey’ at a private after-party at Katsuya. Meanwhile, her ex-underwear model boyfriend Justin Gaston was busy watching Mandy Jiroux perform with The Beach Girl5 at Upper Manhattan. When asked why he chose Mandy’s concert over Miley’s, Justin told E! News he ‘didn’t even know Miley’s tour was in town.’‘ source.