Brandy Cruthird, a teacher at Quincy Upper School in Bay Village, is about to become "America's Next Fitness Star." The Roxbury resident got her big break when she was chosen by fans voting on-line out of a field of nearly 1,000 competitors nationwide. (See earlier entry on this blog.) Jake Steinfeld, founder of ExerciseTV, announced Brandy as the winner in a surprise assembly yesterday at Quincy Upper, a pilot middle/high school. Brandy is also an alumna of the Boston Public Schools. She graduated from the Jeremiah E. Burke High School, where she earned All-State and All-American honors in basketball. After graduating from the Burke, she went on to James Madison University in Virginia, where she was named Rookie of the Year in Division 1 Women’s Basketball. Pictured here, Brandy celebrates her win with her students and Jake Steinfeld.