David Crosby is also saying Crosby, Stills, Nash and Young won't tour again, following similar comments from Neil Young earlier this week.

Twitter. "That's like saying there are mountains in Tibet. We know, Neil. We already knew." As unhappy fans pressed Crosby, he reiterated, "believe me, not going to happen" -- before adding, "he is very angry with me."

CSNY last performed together in 2013. Young spoke about their future plans during a solo concert at the Academy of Music in Philadelphia on October 8, saying "CSNY will never tour again, ever ... but I love those guys."

Crosby recently involved himself in the media frenzy over Young's impending divorce from his long-time wife Pegi. Not long after that news broke, Young was spotted with actress Daryl Hannah. "I happen to know that he’s hanging out with somebody that’s a purely poisonous predator now -- and that’s karma," Crosby responded. "He’s gonna get hurt."

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