Don't recall 3 "The power of love" songs in the charts. There was Jennifer Rush (pop Power Ballad) and there was Huey Lewis (As featured in Back to the Future?). Don't recall a third.
A few years before (round about 1981?) there were 3 songs entitled "Sarah" in the UK charts at the same time. Bob Dylan, Fleetwood Mack and Thin Lizzy.
Quack!
GtD.