Red Hot Chili Peppers were stunned when rock legend Billy Preston agreed to guest on their new album, because he was so ill he could hardly get out of bed. Preston played clavinet on new tune Warlocks, which appears on the Red Hot Chili Peppers' new album STADIUM ARCADIUM, even though he was struggling with a heart infection. Bass player FLEA says, "He got out of bed, played and got back in bed."