making appearances. Mandy Moore sung a light-hearted, '50s style duet with Lee called "Birds and Bees". "Mandy was very sweet and did her best Olivia Newton-John for me. I'm really psyched about this recording," Lee says. Madden helped out with some backing vocals, along with US band Rooney and Sara Watkins from the band Nickel Creek. "American Television" from the album was used in a VH1 advertisement for Flavor of Love 3 and the song "Ripe" appeared in an episode of One Tree Hill (Season 5, episode 2). In 2007, Lee performed a cover of Crosby, Stills & Nash's "Our House" for Landmarks on The DL. In February 2009, Lee released his seventh studio album, The Rebirth of Venus, which received mixed reviews. It featured guest performances from the likes of Missy Higgins and Patience Hodgson, and peaked at No.21 on the ARIA Charts. Lee's eighth studio album, Deeper into Dream, was released on 11 October 2011. It was Lee's first attempt at a concept album, basing the entire 12 tracks around the dream state. Despite not charting, it was received fairly favourably by critics. In April 2013, Lee released his ninth and arguably his most experimental studio album entitled Ayahuasca: Welcome to the Work, with collaboration from Jessica Chapnik. The album is based upon his personal experience with the psychoactive South American drug known as Ayahuasca. Lee featured as the mentor for Joel Madden's team on the 2013 season of The Voice Australia. In June 2015, Lee released his 10th solo album, Love Is the Great Rebellion, his first on a major label, Warner Bros. Records. According to Radio National's Geoff Wood, Lee invented the term "electro-yoga" to describe a new form of music dedicated to the practice of yoga. Lee has since followed up this release with an acoustically-oriented album, entitled Freedom, Love and The Recuperation of the Human Mind, in 2016; as well as a children's album, called Ben Lee Sings Songs About Islam for the Whole Family, in 2017. Together with former How I Met Your Mother star Josh Radnor, Lee formed an indie-folk duo called Radnor and Lee, and released their debut self-titled album in November 2017. 2018 saw the release of B Is for Beer, a soundtrack to the musical based on the novel of the same name written by Tom Robbins. Lee and Robbins had collaborated for ten years to develop the musical.