A benefit concert called “One to One” was held at Madison Square
Garden in New York City to help raise money for Willowbrook, a home
for the mentally challenged at Staten Island. John Lennon headlined
the concert and was backed by a Greenwich Village band called The
Elephant’s Memory. It was the first full concert for Lennon in the U.S.
since the Beatles played Candlestick Park, San Francisco in 1966. As
fate would have it, it would be the only full concerts of his solo career.

Lennon himself bought $59,000 worth of tickets & gave them away to
fans. Overall, $1.5 million dollars was raised to help improve living
conditions at the facility.