🎸 On This Day in Music History – April 18, 1975 🎸 Bay City Rollers mania was in full swing — and the frenzy reached a fever pitch during a BBC Radio 1 Fun Day at Mallory Park in the UK. While the band performed, a crowd of overenthusiastic fans attempted to swim across a lake just to get closer to their tartan-clad idols. The result? Four fans were hospitalized and thirty-five others required treatment — all in the name of Rollermania. This high-energy performance of “Shang-A-Lang” captures ex