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ABC News' Luchina Fisher reports on speculation that Joaquin Phoenix's reported foray into rap is a hoax. It cites an quote from an anonymous former co-worker who says that Phoenix told him this was so. Diddy was mentioned in the article, in this passage:

It's also possible that P. Diddy is in on the hoax. According to media reports, Diddy is producing Phoenix's rap album. At first his rep said she was unaware of his involvement but later she sent an e-mail saying, "I cannot comment on this at this time."