03/02/2012 02:19 pm ET Updated Mar 12, 2012

Pharrell Williams Makes A Guest Appearance On 'Project Runway: All Stars' (VIDEO)

Known for producing top ten hits, Pharrell Williams offered some of his fashion expertise as a judge on last night's episode of "Project Runway: All Stars."

While each contestant showcased eye-catching designs using led technology, Williams had a few choice words for Jerell. ”The styling just came off as like, grandma,” Williams admitted. “You know with the long dress. Her body gets lost, and she just get this long grandma look, you know the grandma that’s like, ‘I used to model 20 years ago, 30 years ago.’”

Jerell wasn’t the only victim of the singer-songwriter’s criticism. Michael also took a verbal lashing for his “futuristic, neon ninja, warrior princess” costume. “When I see that, I just keep seeing Mortal Kombat meets Grace Jones. She’s more fit for like a Comic-Con, perfect for that.”

Find out who gets eliminated in the clip above.