 Personalities on KROQ included Charlie Tuna, Sam Riddle, Jay Stevens, Steve Lundy, Jim Wood, and Jimmy Rabbitt.On November 25, 1972, KROQ presented a concert at Los Angeles Memorial Coliseum, billed as "The Ultimate ROQ Concert/Festival", to benefit the Southern California Council of Free Clinics, which featured performances by Chuck Berry, Stevie Wonder, Frankie Valli and the Four Seasons, the Eagles, the Bee Gees, Sly & the Family Stone, and the Raspberries, among others.In 1973, KROQ's owners bought KPPC-FM, and on November 12th it began simulcasting KROQ, with the new call sign KROQ-FM.