Singer-songwriter Ron Holden died Thursday in Baja California of unreported causes. He was 57.Holden had a million-selling record, “Love You So” on the Donna label, in 1960. He is survived by his wife, Kathy, three sons, four brothers, two sisters and four grandchildren. Services will be held at 2 p.m. Saturday at Los Angeles Intl. Dream Center Church, 2320 Kent St., L.A.