Adam Lambert lit up the joint earlier this week ... and then handed it to Miley Cyrus.
TMZ obtained this photo -- taken at Bootsy Bellows nightclub in West Hollywood -- showing a costumed Adam and Miley passing what sure appears to be a blunt.
Miley -- who came as Lil' Kim -- is no stranger to puffin' trees, but Adam Lambert ... who knew?
In case you're wondering if the club tolerates it, as Simon Cowell would say, Welcome to Hollywood.
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