The boys of One Direction were mobbed when they left Los Angeles International Airport on Monday night -- well, two of them, anyway!

Louis Tomlinson, Niall Horan and Liam Payne left town just hours after the band won three major trophies at the American Music Awards on Sunday night, but Harry and Zayn decided to stay for an extra night before heading to Sydney.

Harry showed off his tatted guns in a short-sleeve shirt, and Zayn didn't look like he was about to keel over, though he did appear a bit exhausted. When asked about recent reports that he has a drug problem, the skinny singer declined to comment...