Complex sentence: On 9 February 1964, she appeared on the Ed Sullivan Show with 16-year old Davy Jones (pre-Monkees) recreating two scenes from the musical then showing on Broadway, the same night as The Beatles made their premiere US appearance on the same show.
Split into simpler sentences: On 9 February 1964, she appeared on the Ed Sullivan Show with 16-year old Davy Jones (pre-Monkees) recreating two scenes from the musical then showing on Broadway. It was the same night as The Beatles made their premiere appearance in America on the same show.