It’s one sweet day for Mariah Carey. The pop diva, who has co-written 18 of her 19 No. 1 hit songs, will be inducted into the Songwriters Hall of Fame. Joining Carey for the 2020 class are the Neptunes, who are the duo of Pharrell Williams and Chad Hugo; former Eurythmics members Annie Lennox and Dave Stewart; the Isley Brothers; Rick Nowels; William “Mickey” Stephenson; and Steve Miller. The acts officially will be inducted at the Songwriters Hall’s 51st annual Induction and Awards Dinner on June 11 in New York City.