Forget Justin Gaston and Nick Jonas — Miley Cyrus has a new man. An eyewitness caught the teen dream indulging in a steamy makeout session with her “Last Song” co-star Liam Hemsworth at Nashville International Airport on Wednesday; Cyrus was dropping off her new beau at departures. Tellingly, the 16-year-old has mentioned the hunky Australian in tweets every day for the past week. Eighteen-year-old Hemsworth plays Cyrus’ love interest in “The Last Song,” which has been shooting all summer in Savannah, Ga. Cyrus’ rep declined to comment. source; (pseudovirus)