"Kanye West can't write, sing or play, he's a poser" says folk rock singer

David Crosby a Grammy-winning 73-year-old folk rock singer told HuffPost

Live in an interview posted on Friday that Kanye West cannot write, sing or play, But he can produce, so he has trouble with him as anything but a poser. 

"Produce? ," Crosby said. "That

means he sits in a chair while the engineer does the work. He's a poser. I'm not backing off it." West, a 21-time Grammy winner who is headlining this weekend's 2015 Glastonbury Music Festival in the U.K., has not responded to Crosby's remarks.

Crosby had first slammed West, 38, back in March, responding to a fan who asked for his opinion about "Kanye's music" and

"impact as an artist." "He's an idiot and a poser...has no talent at all," Crosby replied. He told The Pittsburgh Post-Gazette in an interview published earlier this week that there was "lots" of backlash over his remarks about West. "People raging at me on Twitter, and I don't care," he said. 

"I think the guy's an idiot! What can I tell you?" West, one of the most famous hip-hop stars in the world, had once said his "greatest pain in life" is that he will never be able to see himself perform live.