Hootie - this is what I was referring to, from a short found-on-the-internet synopsis:
In 1985, Willie Dixon sued Led Zeppelin, claiming that "Whole Lotta Love" was largely plagiarized from Dixon's 1962 song "You Need Love." At that time, a lawyer for the Led Zeppelin's record company, Atlantic Records, offered only the weak defense, "It's strange that someone would wait all that time [to file a suit]." The case was settled out of court and recent Led Zeppelin releases have given songwriting credit for "Whole Lotta Love" to Willie Dixon along with all four members of Led Zeppelin. Muddy Waters recorded the first version of "You Need Love" in 1962 as a single for Chess Records, but the version of this song that most directly influenced Led Zeppelin was by the Small Faces. Robert Plant sounds very much like Steve Marriot during the vocal break ("Way down inside, woman, you need... lo-o-ove"). (Incidentally, the Small Faces interpretation of this song, retitled "You Need Loving," was credited to "Lane/Marriot"—Led Zeppelin weren't the only ones who were reluctant to give proper songwriting credit) Robert Plant also briefly quotes Howlin' Wolf at the end of "Whole Lotta Love" with the line "Shake for me girl/I wanna be your back door man." Actually, Plant was once again quoting Willie Dixon, as both of the songs "Shake for Me" and "Back Door Man," though popularized by Howlin' Wolf, were written by Dixon.
Here's the lyrics to "You Need Love" by Willie Dixon. See if it sounds familiar:
You've got yearnin' and I got burnin'
Baby you look so sweet and cunning
Baby way down inside, woman you need love
Woman you need love, you've got to have some love
I'm gonna give you some love, I know you need love
You just gotta have love, you make me feel so good
You make me feel all right, you're so nice, you're so nice
You're frettin', and I'm petting
A lot of good things you ain't getting
Baby, way down inside, you need love
You need to be hugged and squeezed real tight,
by the light of the moon on some summer night
You need love and kissing too,
all these things are good for you
I ain't foolin' you need schoolin'
Baby you know you need coolin'
Baby, way down inside, woman you need love