3 + 3 is the eleventh album released by The Isley Brothers for the Epic label under their T-Neck imprint in August 7, 1973. Their first album for the label after several years in Buddah Records, it was also the first time the family group, which had consisted of founding members O'Kelly Isley, Jr., Rudolph Isley and Ronald Isley, officially included six members instead of the standard three. Following the recording and release of Brother, Brother, Brother the previous year, this was the first album to officially include younger brothers Ernie and Marvin and in-law Chris Jasper, even though all three had played on the previous several albums. The success of the album is attributed to their first Top 10 pop record since "It's Your Thing", with their own cover of the self-penned "Who's That Lady", now re-titled "That Lady, Pt. 1 & 2". Other hit singles included the top five R&B single, "What It Comes Down To", and their cover of Seals & Crofts' folk hit, "Summer Breeze", which was also a top ten R&B single. The album became their first platinum album.