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(TMZ) - Miley Cyrus is NOT in the Ying Yang Twins music video tribute to her bootyful backside - so they got the next best thing ... an impersonator with serious ass shaking skills!

TMZ obtained a clip from the Twins' new video for "Miley Cyrus" featuring a twerked out look-alike in a unicorn onesie - an obvious parody of the singer's popular YouTube clip. 

The whole video is set to drop soon - and TMZ reports that the impersonator actually gives M.C. a run for her money in the badonkadonk department.

Clap, Clap, Clap, Clap.