Darlin' is a song by the Beach Boys, which they released in 1967. The music was written by Brian Wilson and the words by Mike Love; Carl Wilson sings the lead vocal on it.
Wilson and Love initially wrote it as "Thinkin 'Bout You, Baby", which was recorded by one Sharon Marie in 1964. I can’t find her version, but this is a 1972 recording of the song by American Spring, a duo who comprised Marylin Wilson (Brian's then wife) and her sister Diane Rovell. This version of the song was also covered in 1993 by Glasgow indie band BMX Bandits.
Darlin was a tolerably sized hit for the Beach Boys, but came at a time when their popularity was waning along with Brian Wilson's health. Here is a live performance by the Beach Boys at the Knebworth festival in 1980.
It has been covered a few times, incuding, in 1971, by Herb Alpert & the Tijuana Brass. David Cassidy recorded the song in 1975, and reprised it in an amazing performance on a TV show 2 years later with Flo and Eddie, who had been in The Turtles and The Mothers Of Invention. In 1977 Paul Davis recorded a very MOR version. The Japanese singer songwriter Tatsuro Yamashita recorded a very faithful version of the original in 1984. French band Darlin' did a cover of the song; one of their records was reviewed in the UK as "daft punky thrash", which later inspired the name of the electronic duo formed by two of Darlin's ex members.