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Ozzy Osbourne is taking a three-week break from Ozzfest to be with his wife, Sharon, as she begins chemotherapy treatment for colon cancer. He'll rejoin the tour in Denver on Aug. 22. "This has been one of the hardest decisions I've had to make, and I'm hoping that my fans will understand," Osbourne said. Meanwhile, an MTV rep tells Reuters that the second season of The Osbournes is still slated to debut in the fall, but "our primary concern is for Sharon's well-being, and we're going to take it one step at a time."