Much of the diversity in sound can be attributed to Gorillaz's constantly expanding group of collaborators. The original musical lineup — as heard on 2001's Gorillaz — blended the talents of Albarn and Dan "The Automator" Nakamura, as well as Kid Koala, Del tha Funkee Homosapien, Cibo Matto's Miho Hatori and Tom Tom Club's Tina Weymouth and Chris Frantz. Soon, with the follow-up Demon Days, Gorillaz's ever-rotating cast expanded to include Danger Mouse, Blondie's Debbie Harry, De La Soul and singer Martina Topley-Bird.