Joaquin Phoenix brought his phony stony act to David Letterman last night -- and while Letterman thought he was catching the wannabe rapper in an altered/inebriated state, it's Dave who was likely hoodwinked.
We've been on to Joaquin's scam for weeks now -- no doubt he's shooting a mockumentary with Casey Affleck ... pretending he's quitting acting to become a rap star -- even though his singing sucks -- and showing how the media will fall for it.
In Dave's defense -- he ripped the guy apart, ending the interview with "Sorry Joaquin couldn't be here tonight."
Letterman Falls for the Joaquin Sideshow
2/12/2009 3:45 AM PST BY TMZ STAFF
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