Last night, Lana Del Rey kicked off her Endless Summer tour (featuring Courtney Love and, at later dates, Grimes) in The Woodlands, TX and she had a few surprises in store for the crowd. During her set, she performed unreleased track called 'Serial Killer' -- a song she recorded in 2012. The video, taken by a fan, captures Lana's angelic vocals over a mostly silent crowd. Her fourth album, Honeymoon, is due in August but until then catch Lana in a city near you for her tour, which ends in West Palm Beach, FL on June 16th. Watch the performance above and listen to the recorded version of 'Serial Killer' below.