Wayne Gretzky's smokin' hot daughter channeled Gabrielle Union in "Bring It On" ... putting on the tiniest Clover cheerleader outfit for her costume this year -- and she KILLED IT!!
The 30-year-old mother of two celebrated the holiday in epic fashion ... partying it up with her golf superstar husband, Dustin Johnson.
The couple appeared to have the spooky bash at their place -- with golf star Brooks Koepka and his model GF, Jena Sims, in attendance -- but all eyes were on Gretzky.
The Great One's daughter was dancing, hula-hoopin' and waiving pom poms .