 Berry took science and music classes at UCLA, became a member of Phi Gamma Delta fraternity, and entered the California College of Medicine (now the UC Irvine School of Medicine) in 1963.Jan and Dean reached their commercial peak in 1963 and 1964, after they met Brian Wilson.The duo scored sixteen Top 40 hits on the "Billboard" and "Cash Box" magazine charts, with a total of twenty-six chart hits over an eight-year period (1958–1966).