They're getting sneaky with these questions now hey?
#59
I think it is: Don't Let Me Down [like you said, a Beatles song] but by Doug Dillard and Gene Clark.
Track 23 on this album.
No sample on there, sorry.
The other two are a bit tricky.
[still looking though]
edit: #55 = YouTube - The Streets - Turn The Page
aka; Mike Skinner [one man band]