In the last two years, Mariah Carey has cycled through three managers, two album release dates and four new tracks--will her fifth be the charm? On Feb. 12, Carey unveiled the latest single from her long-delayed new album. The finger-snapping ballad "You're Mine (Eternal)" is her fifth new song since 2009's Memoirs of an Imperfect Angel, none of which has risen higher than No. 15 on the Billboard Hot 100. With Carey's 14th album now slated for May 6, a lot is riding on the fate of "You're Mine" for both Carey and her label, Island Def Jam.

How's it doing? The track garnered a modest 245 all-format plays in its first day at radio, according to Nielsen BDS, though the IDJ strategy is to let it develop organically before a radio push begins Feb. 24. And sources at radio say the straight-ahead ballad may be the kind of return to form Carey needs. The hope is that after almost four years of work, Carey's next record...