On February 25, 1964: The Beatles entered EMI studio 2 at Abbey Road in St. John's Wood, London in order to complete the recordings for the single started in Paris, France earlier in the year. Mainly, the vocals and guitar solo were re-done and the B-side was completed on this day.
"Can't Buy Me Love" had a fresh vocal by Paul, eliminating the scat background vocals. Also, the original guitar solo by George was replaced with his 12-string Rickenbacker (which was used quite a lot on the "Hard Day's Night" soundtrack).
There were 9 takes of the B-side ; "You Can't Do That" and take 6 has been released commercially on the Apple 3-LP/2-CD "Anthology 1" audio.
It should be noted that other songs attempted at this session include a couple of takes of "And I Love Her"; take 2 can also be heard on the "Anthology" audio, and three takes of "I Should Have Known Better" which remain unreleased.