You're Not Sorry is a country rock song performed by American singer-songwriter Taylor Swift. The song was solely written by Swift and produced by Nathan Chapman with Swift's aid. It was released on October 28, 2008 by Big Machine Records as a promotional single from Swift's second studio album, Fearless on iTunes, though it is no longer available. A remix version for the television episode of CSI: Crime Scene Investigation that Swift made an appearance in was later released. Swift wrote "You're Not Sorry", inspired by an ex-boyfriend who was revealed to be opposite of what he appeared to be. The song is a power ballad with country and rock music influences.
Contemporary critics gave "You're Not Sorry" average to favorable reviews. In North America, the song achieved commercial success. It peaked at number 11 on Canadian Hot 100. In the United States, "You're Not Sorry" also peaked at number 11 on the Billboard Hot 100 and was certified gold by the RIAA. Swift performed the song in several venues, including on her first headlining tour, the 2009 and 2010 Fearless Tour. During the tour, Swift performed a mashup of a cover version of Justin Timberlake's "What Goes Around.../...Comes Around" and "You're Not Sorry".
As it was not released as a double-single, "You're Not Sorry" did not receive airplay, thus its chart appearances consisted mainly of digital downloads. The song entered Billboard's Hot Digital Songs Chart at number two, which led to an appearance on the Billboard Hot 100 on the week ending November 15, 2008. "You're Not Sorry" debuted and peaked at number 11 on the Billboard Hot 100, becoming the week's top debut and narrowly missing Swift's top ten debut of 2008. In the succeeding week, the song descended to number 35 and then fell off the chart. Upon the release of the CSI remix, it re-entered the Billboard Hot 100 at number 67. "You're Not Sorry" is one of 13 songs from Fearless charted within the top 40 of the Billboard Hot 100, breaking the record for the most top 40 entries from a single album. "You're Not Sorry" spent a total of five weeks on the Billboard Hot 100. Also in the United States, "You're Not Sorry" peaked at number 21 on the now-defunct Pop 100 Chart. It was certified gold by the Recording Industry Association of America (RIAA) for the shipment of 500,000 units. The song debuted and peaked at number 11 on the Canadian Hot 100. As of December 2011, "You're Not Sorry" has sold 653,000 copies in the USA.