FILE - In this Oct. 20, 2019 file photo Mariah Carey performs during a concert celebrating Dubai Expo 2020 One Year to Go in Dubai, United Arab Emirates. Christmas has come early for Carey: the pop star’s original holiday classic, “All I Want for Christmas Is You,” has reached the No. 1 spot on the Billboard Hot 100 chart 25 years after its release. Billboard announced that the song topped this week’s chart, giving Carey her 19th No. 1 of her career.  (AP Photo/Kamran Jebreili, File)
 Mariah Carey is the first artist to have number one hits in four different decades. Kamran Jebreili / AP photo

TikTok, Black Lives Matter and women are dominating the music industry in 2020