Michael Schneider Variety Editor at LargeSPOILER ALERT: Do not read ahead if you have not watched the two-hour Season 4 finale of “The Masked Singer,” which aired Dec. 17 on Fox.LeAnn Rimes shouldn’t feel “Blue”: The singer shined on Wednesday night, as she was unmasked as “The Masked Singer” Season 4 winner — the Sun.Also revealed: Runner-up Aloe Blacc, who had been dressed as Mushroom, and third-place Nick Carter, who had performed as Crocodile.“I never thought I would do anything like this