Barr and Fattal combine for five goals in victory.
UCLA leapfrogs Stanford for top spot in the women's water polo rankings.
UCLA junior earned MPSF Player of the Week and UCLA/Muscle Milk Student-Athlete of the Week honors.
Charlotte Pratt scores three goals in the championship, including the game-winner.
Bruins beat Loyola Marymount and Hawai'i on Saturday.