BJ the Chicago Kid spent years crafting In My Mind, a dazzling merger of post-millennial R&B and vintage soul. Tender, God-fearing ballads like “Shine” and the funk-testifying “Jeremiah” sit well next to “The New Cupid,” which unfolds over a crackling stutter-step break as guest Kendrick Lamar yearns for true love amidst one-night flings. In contrast to the modern 8-bit videogame flurries of “Man Down,” “Woman’s World” is a throwback ballad with a vintage ‘60s tempo that notes how times have changed since James Brown’s “It’s a Man’s, Man’s, Man’s World.”