"Lifesong" is a song recorded by Christian rock band Casting Crowns. Written by Mark Hall and produced by Mark A. Miller, it was released as the lead single from the band's 2005 album Lifesong. According to Mark Hall, the lead vocalist of Casting Crowns, "Lifesong" came out of what he found himself saying to students in his church's youth ministry. Compared to the work of rock band U2, the song lyrically points believers towards honoring God in all they do.
"Lifesong" received mostly positive reviews upon its release, with some critics praising the song's musical arrangement. The song was nominated for two awards at the 37th GMA Dove Awards and has been performed by Casting Crowns in concert. It was a hit on Christian radio, topping the BillboardHot Christian Songs and Hot Christian AC charts as well as the Radio & Records Christian AC and Soft AC/Inspirational charts. It also peaked inside the top ten on the Radio & Records Christian CHR chart. It ranked at number twenty-one on the 2000s decade-end Hot Christian Songs chart and number twenty-seven on the decade-end Hot Christian AC chart.
"Lifesong" is a song with a length of four minutes and thirty-seven seconds; the version of the song on Lifesong has a length of five minutes and sixteen seconds. It is set in common time in the key of A major and has a tempo of 112 beats per minute. Mark Hall's vocal range in the song spans from the low note of A3 to the high note of E5. "Lifesong" has been described as a power ballad and "robust pop", and it has been musically compared to the work of rock band U2, Lyrically, it "points believers towards honoring God in all they do". According to lead vocalist Mark Hall, the song came out of what he found himself saying and praying to the student's in his church's youth ministry.
"Lifesong" was released as a digital single on July 19, 2005, with Josh Bates' "Perfect Day" as its B-side. It was released to Christian AC, Christian CHR, and Soft AC/Inspirational radio on July 30, 2005. "Lifesong" debuted at number twenty-one on the BillboardHot Christian Songs chart for the chart week of August 6, 2005. It advanced to number ten in its third week and to number two in its fourth week. In its seventh chart week, "Lifesong" advanced to the number one position on the chart. It spent a total of ten non-consecutive weeks atop the chart and thirty-four weeks on the chart in total. "Lifesong" also peaked at number one on the BillboardHot Christian AC chart, the Radio & Records Christian AC chart, and the Radio & Records Soft AC/Inspirational chart. It peaked at number seven on the Radio & Records Christian CHR chart.
"Lifesong" ranked at number twelve on the 2005 year-end Hot Christian Songs and Hot Christian AC charts and at number nineteen on the 2005 year-end Radio & Records Christian AC chart. It ranked at number sixteen on the 2006 year-end Hot Christian Songs chart and at number seventeen on the 2006 year-end Hot Christian AC chart. It also ranked at number twenty-one on the decade-end Hot Christian Songs chart and at number twenty-seven on the decade-end Hot Christian AC chart. "Lifesong" was included on the compilation albumsWOW Hits 2007 and Wow: Best of 2007. A live version of the song was included on Casting Crowns' live albumLifesong Live.