Rilo Kiley is well on its way towards finishing its fourth album, reports singer Jenny Lewis.

Rilo Kiley is well on its way towards finishing its fourth album, reports singer Jenny Lewis. Lewis tells Billboard.com that the California quintet has recorded 20 songs for the follow-up to 2004's "More Adventurous," though she adds, "we haven't mixed anything yet."

The group has been working with producer Jason Lader (Vietnam) and recording at Sunset Sound in Los Angeles, marking "the first time we've worked in a legitimate studio. It was a bit scary at first; the Rolling Stones recorded there, and Sheryl Crow. It was unusual for us, but we ended up feeling comfortable there."

After a year-long band break that allowed Lewis to tour in support of "Rabbit Fur Coat," her critically acclaimed album with the Watson Twins, the singer and multi-instrumentalist says it was good to get back in a group mode. "I wanted to write songs that rocked a little bit more and kind of had a more band feel to them," she says. "I was kind of longing for a more complicated approach, I guess."

Rilo Kiley's next step, according to Lewis, will be assembling an album from the songs they've recorded, which she expects to be a "difficult process. In a band, it's a bit of a compromise. It's a democracy. Everybody has to be happy. So hopefully we can find a way to make it come together."

Lewis predicts that Rilo Kiley's album will come out some time during the first half of 2007. Meanwhile, she recently recorded a version of "Little Boxes" to run over the credits of Showtime's "Weeds" and is finishing up tour dates in support of "Rabbit Fur Coat."