Other acting credits include Raymond Figg in the Disney Channel Original Movie, Life Is Ruff, the voice of Aang in the unaired version of the pilot episode of Avatar: The Last Airbender, the voice of DJ in the film Monster House, and Hannah Montana: The Movie, which was released on April 10, 2009.He appeared in the Disney Channel Games in 2006 on the Green Team, and appeared on the Red Team in 20.Also in 2009, Musso collaborated on the School House Rock song "The 3 R's"; an educational song about recycling.In a studio effort, Musso released his self-titled debut album on June 2, 2009.His debut single, "The In Crowd," a cover of a John Hampson song, premiered on Radio Disney on December 5, 2008.
And sang "Live like Kings" on Disney XD's Pair of Kings on Disney Channel.
Before Musso was cast in Secondhand Lions, he had been in several films beforehand: Am I Cursed?
as Richie and The Keyman as a Cub Scout, both in 2002.
He presented awards to the Best Actor and Best Actress of the 2007–2008 theatrical year.
In 2008 Musso, Miley Cyrus and Billy Ray Cyrus all made "family" guest appearances in Metro Station's music video for "Seventeen Forever".
Musso sang a remixed remake of the song "Lean on Me" for the Disney film, Snow Buddies; the music video is included on the DVD and the song is included on the Radio Disney Jams, Vol. Musso also sang the song "If I Didn't Have You" with Hannah Montana co-star Emily Osment for the Disney Mania 6 CD in 2008 and sang the song Stand Out for the Disneymania 7 CD in 2010.