In 1973, while recording the Eat It album, Humble Pie hired three black American women to sing backing vocals. The trio, consisting of Vanetta Fields, Clydie King and Billie Barnum, and collectively called the Blackberries, also recorded their own album, produced by Steve Marriott. The album was never released. In this video, the Blackberries perform Twist And Shout, with Humble Pie backing them up. Marriott and Dave "Clem" Clempson play guitar, while Greg Ridley plays bass and Jerry Shirley plays drums.
In 1971 Kenny Loggins and Jim Messina (formerly of Buffalo Springfield and Poco) released their debut album Sittin' In, which starts off with Nobody But You, written by Messina. The two singer/guitarists were aided by Al Garth and Jon Clarke on saxes, Larry Sims on bass, Merel Bregante on drums, Michael Omartian on keyboards and Milt Holland on percussion.
When Fleetwood Mac recorded the album Mystery To Me in 1973, Christine McVie contributed backing vocals to several of Bob Welch's songs. On Keep On Going, however, she sang the lead. This became one of the few times in which one member of Fleetwood Mac sang lead on a song written completely by another member.
To finish, Lady Put The Light On is from Brownsville Station's eponymous 1977 album. Guitarist Bruce Nazarian, at the time new to the band, sings lead vocals. It sounds like he, Cub Koda (guitar) and Mike Lutz (bass) worked out some good harmony parts. Henry "H-Bomb" Weck plays drums. In keeping with the song's title, the video shows some impressive lights.
Brownsville Station disbanded in 1979, but was revived by Lutz and Weck in 2012. Weck helped produce Blackfoot's album Strikes, on which Koda played harmonica. Lutz produced and played bass for Ted Nugent. Koda died in 2000 from kidney disease. Nazarian played in other bands such as The Automatix, and died in 2015.