Not so fast.
"She's got a great voice," Palmer says. "But she's a really good visual artist. She's really interested in graphic novels."
Cobain was intrigued by Palmer and fellow musician Jason Webley's concept for the album, Evelyn Evelyn, which focuses on twin singer-songwriter duo. Palmer was impressed with Cobain for more than her singing.
"She's really smart, level-headed, motivated, and incredibly funny," says Palmer, who met Cobain for the first time while with her fiancé, graphic novelist Neil Gaiman, of which Cobain is a fan. "She has her own really strong personal work ethic and she wants to find her own voice and make her own art and she's going to do it by playing by her own rules."
Cobain's voice was mixed into a chorus with those of "Weird Al" Yankovic, Tegan and Sara and Gerard Way from My Chemical Romance. "We wanted to have a list of really random people on it as a joke," explains Palmer. The album dropped Tuesday.