The Isley Brothers have been around since the 1950s. They have had hit records in a variety of styles since then.
“Shout” was recorded in 1959. It has been covered numerous times.
They had a 1962 hit with “Twist and Shout” which is also known for the version by the Beatles from 1963 with John Lennon on lead vocals.
“This Old Heart of Mine (Is Weak for You)” was recorded for Motown’s Tamla label in 1966. The Isley Brothers were on Motown until 1968 and their records sound more like Motown records than their own original records. They also recorded “I Guess I’ll Always Love You” in 1966. Holland-Dozier-Holland wrote the first one with Sylvia Moy and the second by themselves.
The 1969 record on their own label “It’s Your Thing” was their biggest hit at that time. They wrote and produced it.
Sad! 