The Isley Brothers have one of the longest and most diverse musical careers ever in the music business globally. They started as a trio (O'Kelly Jr, Rudolp and Ronald) in the late 1950's and they continue still as a duo with Rudolph and Ernie while past members include also Marvin and Vernon plus Chris Jesper. They have had two US #1 albums (in 1975 and 2003) and eight Top-20 singles. They recorded two albums with Motown and This old heart of mine (is weak for you), another Holland-Dozie-Holland creation with Sylvia Moy was a #12 hit in the US and #3 in the UK for them. The most well known cover version is by Rod Stewart who has done it twice ( in 1975 solo ) and in 1989 with Ronald Isley himself. Other cover version include The Supremes , Luv, Randy Crawford, Boyzone The Impressions Can't satisfy was sued by Motown for plagiation and won.