American Idol runner-up Adam Lambert is transforming from glam rocker to bloodsucking glampire this Halloween!

“I’m going as a glampire!” Adam — a self-proclaimed Twilight fanatic — dished to RadarOnline today. “I love Twilight, I love vampires, I’m a big fan, so I decided to go as a vampire who likes to glam it up.”

Lambert’s still-untitled debut album drops Nov. 24.