Cortez scored the first instrumental to top the Billboard Hot 100 in 1959 with his high-energy electronic organ hit "The Happy Organ."
The artist died by suicide in Atlanta on July 4, according to friend E.D.I. Mean.
Swaggart had two cousins who made it big in music: rock ’n’ roll legend Jerry Lee Lewis & country star Mickey Gilley.
The R&B group’s best-known hits include ‘And the Beat Goes On’ and ‘Rock Steady’.
Stevens was influential in launching the careers of Justice, Tame Impala and more.
He also starred in the TV show Here Come the Brides with another future pop star, David Soul.
Bandmates Paul Rodgers & Simon Kirke pay tribute to their late friend on social media.
The 1980s duo is best known for the R&B/pop hit "Don’t Stop the Music."
"We feel very fortunate to have known/loved and worked with him," the Pete Doherty-led group wrote.
Lewis revealed her breast cancer diagnosis in 2020.