R&B Star Jon B. (“Someone to Love”) - We love Jon B.'s super-smooth singing and romantic melodies on '90s faves like “They Don’t Know” and “Someone to Love” — and we're not alone. Tupac Shakur was such a fan of Jon B.'s first album, "Bonafide", that they ended up teaming up on a song for his follow-up (the tune, "Are U Still Down," includes the final rap verse that Tupac ever recorded).