In the mid-1990s, inspired by Lyle Lovett's writing, she moved to Nashville, Tennessee, to write country music. In Los Angeles, California, Green wrote the lyrics for two musicals, Once Upon a Primetime and Up the Week Without a Paddle, which earned her a nomination from the Los Angeles Drama Critics Circle. In New York City, a concert of Green's original revue Put a Little Love in Your Mouth!, was performed at off-Broadway's Second Stage Theatre in March 2003, and featured Jessica Molaskey, Mario Cantone and Billy Stritch. A recording of a live performance was released on compact disc. She also wrote the lyrics for and co-starred with Nancy Opel in For the Love of Tiffany: A Wifetime Original Musical, which enjoyed a sold-out run at The Wings Theater as part of the New York International Fringe Festival in August 2003. In July 2004, Green and her mother co-hosted a concert titled Bernstein, Comden and Green: A Musical Celebration at the Venetian Theatre at the Caramoor Center for Music and the Arts in Katonah, New York, with performers Sylvia McNair, Judy Kaye, Jason Graae and Hugh Russell. In 2009, Green appeared in concert at Feinstein's at the Loews Regency, in New York City, with performers Jenn Colella, Ann Harada and Norm Lewis. Green enrolled in the BMI Lehman Engel Musical Theatre Workshop, where she met Tom Kitt, who suggested the two collaborate on a musical stage adaptation of the comedy-drama filmHigh Fidelity. In a move reminiscent of the days when Broadway musicals routinely tested the waters out-of-town first, the show had a one-month run at Boston's Colonial Theatre before heading to New York City. After eighteen previews, the production opened on December 7, 2006, at the Imperial Theatre in New York City where, hampered by poor reviews, it closed after fourteen performances. The musical Bring It On: The Musical, with music and lyrics by Lin-Manuel Miranda, Tom Kitt and Green and book by Jeff Whitty, premiered at the Alliance Theatre in Atlanta, Georgia, on January 16, 2011. Green has written a number of songs with Phish leader Trey Anastasio, one of which was performed live by Anastasio in May 2010. Green and Anastasio wrote the music, with lyrics by Green and the book by Doug Wright, for Hands on a Hardbody, which is a stage musical version of the documentary film . The musical had its world premiere at the La Jolla Playhouse in San Diego, California, in April 2012, and ran on Broadway in April 2013. Green and Anastasio received a nomination for the Tony Award for Best Original Score. She is the recipient of a 2004 Jonathan Larson Award and grant for excellence in songwriting, and a contributing writer to Playboy magazine.