Billy Ray Cyrus just won a bunch of cool points with his daughter Miley Cyrus ... by dropping a TON of cash on a new set of wheels for her 21st birthday.
Sources close to the deal tell us Billy Ray plunked down $24k on a 2013 Can Am Spyder ... with a customized Miley Cyrus flair.
If you look closely ... it's not a Gucci design -- it's got tiny M.C.'s all over it.
Guess those "Achy Breaky" royalty checks never stopped.
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