Mariah Carey has announced she will release a swathe of rare archival material to celebrate 30 years of her career, under the coined hashtag #MC30.New content will be released every Friday and will span digital EPs, remixes, bonus cuts, rare tracks, acapella renditions and live performances from Carey’s career.Per a press statement, the music releases will be accompanied by video footage, photos, physical releases and personal notes from the singer.The first drop for #MC30 features Carey’s debut