Vampire Weekend is being sued for more than $2 million by the hot chick pictured on the cover of their newest album -- because she says an impostor put her John Hancock on the consent form.
The model is Kirsten Kennis -- who claims she took the original photo way back in 1983 -- and had no idea it was being featured on the album "Contra" ... until after the band began to promote it back in November.
In a lawsuit, filed yesterday in L.A. County Superior Court, Kennis claims she thinks it all has to do with a "photographic release" that the band obtained from a photographer named Tod Brody.
Problem is, Kennis claims the signature on the release is a forgery. Kennis blames the band for not verifying the legitimacy of the release -- and is suing VW and the photog for more than $2 mil.