Article continues below advertisementElton John has turned what should have been festive cheer into a pointed act of domestic theatre after fans seized on what they branded a "filthy" oven in the kitchen of his U.K. mansion, prompting what insiders tell OK! has become a series of near-obsessive clean-up rituals.Article continues below advertisementSource: MEGAElton John went viral for his 'filthy' oven. Article continues below advertisementThe episode began in late November, when the "Rocketman," 78, shared a playful Instagram video filmed at his $5.