The sound of R&B is difficult to pin down. Since the 1950s, the label has been used both as a genre and as a catch-all for the entirety of black popular music. Soul, funk, disco and even hip-hop have at times been covered by this "R&B" umbrella. On Chance The Rapper's new album, The Big Day, all of these influences come through—and he's not alone. On recent Kehlani records, 90s R&B and 2000s trap both play a role. But both these artists are a far cry from the 50s R&B sounds of Sam Cooke. To understand how R&B has changed over time, we consult with Trevor Anderson, manager of Billboard's R&B/Hip Hop chart. Then we speak with R&B super-producer Oak Felder to understand how R&B is progressing and what it might become. Songs Discussed Chance The Rapper – Hot Shower Chance The Rapper – I Got You Sam Cooke – You Send Me Elvis Presley – Crying In the Chapel The Temptations – I Can’t Get Next To You Mtume – Juicy Fruit Biggie – Juicy Toni Braxton – Breath Again Janet Jackson – That’s The Way Love Goes Boys II Men – I’ll Make Love To You Lauryn Hill – Doo Wop (That Thing) Diddy – I’ll Be Missing You (feat. Faith Evans & 112) Nelly – Dilemma Kehlani – Distraction SWV – Weak Aaron Hall – I Miss You Usher – You Make Me Wanna Brandy – Sit-in Up In My Room Dru Hill – In My Bed Silk – Freak Me Demi Lovato – Sorry Not Sorry Jodeci – Cry For you Mariah Carey – Vision of Love Kehlani Everything Is Yours Chance The Rapper – All Day Long Queen – Fat Bottom Girls Diana Ross – I’m Coming Out For an in depth history of R&B on Billboard, read Chris Molanphy's feature on Pitchfork. Learn more about your ad choices. Visit megaphone.fm/adchoices