The Chiffons. From Wikipedia :
"Harrison denied deliberately plagiarising the song, but he lost the
resulting court case in 1976 as the judge deemed that Harrison had
"subconsciously" plagiarised "He's So Fine". When considering
liable
earnings, "My Sweet Lord"'s contribution to the sales of /All Things
Must Pass/ and /The Best of George Harrison
<http://en.wikipedia.org/wiki/The_Best_of_George_Harrison>/ were taken
into account, and the judge decided a figure of $1,599,987 was owed to
Bright
Tunes.^<http://en.wikipedia.org/wiki/George_Harrison#cite_note-Plagiaris…
The dispute over damages became complicated when Harrison's former
manager Allen Klein <http://en.wikipedia.org/wiki/Allen_Klein> purchased
the copyright to "He's So Fine" from Bright Tunes in 1978. In 1981, a
district judge decided that Klein had acted improperly, and it was
agreed that Harrison should pay Klein $587,000, the amount Klein had
paid for "He's So Fine", so he would gain nothing from the deal, and
that Harrison would take over ownership of Bright Tunes, making him the
owner of the rights to both "My Sweet Lord" and "He's So Fine"
and thus
ending the copyright infringement claim. Though the dispute dragged on
into the 1990s, the district judge's decision was upheld."
Another recent example is the signature flute in Men At Work's - Down
Under and a nursery song [1][2]. It's a sad state of affairs...
[1]