Jonn Hart

Bay Area vocalist Di'Jonn Grizzell, who performs as Jonn Hart, reached mainstream R&B radio in 2012 via the chiming, booming, and raunchy single "Who Booty," which also introduced the style he labeled "R&Bay slap." A remix that included a verse from rapper French Montana kept the track circulating on airwaves longer. The song ultimately reached number 25 on Billboard's Hot R&B/Hip-Hop chart before the year closed. Hart then operated independently through the Cool Kids Cartel label, issuing successive volumes in both the Heart 2 Hart and Cool Kid Cartel Collection series of mixtapes and EPs. He likewise kept delivering bass-heavy, club-oriented singles such as "Papi," "Back That Azz Up," and "Trippin."