Singer-songwriter David Crosby (of the Byrds and Crosby, Stills, Nash and Young) recently took to talk show Watch What Happens Live to voice his opinion on Kanye West's talent, saying "he can neither sing, nor write, nor play." Crosby, a longstanding music icon in his own right, is not shy to say what he really thinks. When asked to explain, he expresses that he is particularly dismayed by West's stance as "the greatest living rock star," and even gave some recommendations for Kanye's education, saying someone needs to "send him all of Ray Charles' catalog so he can learn how to sing."

Watch the rant above and see a couple past Tweets from Crosby on Mr. West below.