Gerry and the Pacemakers??
WAG.
The Dave Clark Five was the first to come over and perform live.
The Beatles were second. When they arrived there was such a huge commotion at the airport that Ed Sullivan, who was waiting on a plane that day, went to see what all the excitement was about.
He offered the Beatles $50,000 to appear on his show.
That was a lot of money in February of 1964, not to mention the exposure. The Beatles took the offer and appeared on the show several more times in the next month or so.