Misc: How did the London Bridge collapse?

Questions

In 1953, Clyde McPhatter left the Dominoes to form this group?

In 1957 which actress recorded 'Tammy' from one of her films?

In 1958, this Tommy Edwards tune began "Many a tear has to fall"?

In 1962 Robert Zimmerman legally changed his name to what?

In 1964, who recorded "baby love"?