In April 2006, Barnes released "What The Hell Are You Waiting For?", the lead single from his debut studio album. Barnes did a five-week promotional tour in the Americas and Europe. Barnes' self-titled album, Casey Barnes, was released in August 2007. In November 2007, Barnes released a duet with Connor Maclean, titled "How Good It Would Be", through Sony BMG. The song was featured on Maclean's Christmas album with all proceeds of the single and album going towards Westmead's Children's Hospital. In 2008, Australian DJ-producer Marco Demark released a version of Elton John's "Tiny Dancer" featuring Barnes. The track peaked at number 66 in Australia.
2009: ''Australian Idol''
In 2009, Barnes entered the seventh series of Australian Idol. He auditioned at the Brisbane auditions and made it to the semi-finals before being eliminated but received a wildcard into the top 12. In the live shows, he performed " On My Mind" and "I'm Not Over" but was eliminated after week two in September, placing eleventh.
In May 2010, Barnes released an EP titled Red Lion Motel. and lead single "I Promise". In September 2012, Barnes released Jet Trails which he wrote in Nashville with Rick Price and promoted the album with shows in New York, Nashville and Los Angeles. He also performed around Australia, including the main stage of the Caloundra Music Festival. In June 2014, Barnes released a second EP titled Flesh & Bone which was produced by Price and mixed by Grammy Award winner Jason Leaning. The EP saw the release of four singles, "Valentine", "Flesh and Bone", "Waiting on the Day" and "Hard Times". The tracks received radio airplay nationwide. In 2014, Barnes reached the finals of two prestigious US based competitions; International Songwriting Competition and Unsigned Only.
2016-present: ''Live as One'' & ''The Good Life''
In 2016 recorded his fourth studio album, Live as One in Nashville. The album's title track became the first single which had a powerful music video, featuring well-known Australians along with national and international sporting identities holding up #LiveAsOne signs. The album's second single "Just Like Magic" was released in December 2016 peaked at No. 1 on the Top 40 Country Tracks Chart and the Australian Country Radio Charts. In June 2017, Barnes released "The Way We Ride" which became a radio favourite and peaked at No. 1 position on the Top 40 Country Tracks for 4 weeks. This song also saw Barnes nominated for his first Golden Guitar Award for Best New Talent. "Keep Me Coming Back" was released in August 2017 and also peaked at No. 1 on the Australian Top 40 Country Tracks. Barnes supported the track with the "Keep Me Coming Back Tour". In February 2018, Barnes released "Ain't Coming Home", the third single from his fourth studio album The Good Life, which was released in March 2018. In 2017, Barnes was a finalist for Australian Male Artist of The Year and won the Media Impact Award in the Planet Country Music for a New Generation Awards. In 2018, Barnes was again a finalist for Australian Male Artist of The Year in the Planet Country Music for a New Generation Awards and was voted as the winner.
