McGowan -- Glambert Needs a Makeover

Rose McGowan loves Adam Lambert's voice ... but his personal style, not so much.

Rose McGowan: Click to watch
We got the outspoken "Planet Terror" star outside Chateau Marmont last night, where she put the "Idol" runner-up on blast -- saying his clothes are "unacceptable" and "too Melrose."

Rose also said Kara's gotta go though ... so at least we can all agree on something.