Lebron James tied the knot in California last night -- and instead of some crappy band "We Are Family" -- playing at the reception ... they got JAY-Z and BEYONCE!!!!
The Miami Heat forward and his fiance Savannah Brinson made things official during a ceremony in San Diego at the Grand Del Mar Hotel ... after dating 12 years.
According to reports -- the 28-year old basketball player was joined by teammate Dwayne Wade and his girlfriend Gabrielle Union ... as well as Jay-Z and Beyonce who performed "Crazy in Love" at the reception.
... and you thought the picture booth at your wedding was cool.
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