Who is the singer of Farmer's Daughter?

Merle Haggard

There's actually several artists who have done it: Merle Haggard, Brach Boys, and Fleetwood Mac.

Merle Haggard

"Farmer's Daughter" is a song written by Brian Wilson and Mike Love for the American pop band The Beach Boys. It was released on their 1963 album Surfin' USA. The song was covered in an impromptu backstage performance by Fleetwood Mac and included on their 1980 album Fleetwood Mac Live and, later, on the 2004 deluxe CD issue of Tusk.
The song was originally credited to just Wilson. Mike Love's name was added as a result of a lawsuit filed by him against Wilson in the 1990s.

Merle Haggard

The one I recall is the one Caveman said

the one and only MERLE HAGGARD!

Some shmuck by the name or Urla hagart or something like that.