"Stop Crying Your Heart Out" is a song by the English rock band Oasis. The song was written by Noel Gallagher and produced by Oasis. It was released on 17 June 2002 as the second single from the band's fifth studio album, Heathen Chemistry (2002). Liam Gallagher is the lead vocalist on the track, with Noel on backing vocals. The ballad was heavily compared to the band's past single "Slide Away". While some praised Noel's ability to lighten the mood of his target audience, others felt that the song was disappointing and forgettable.

"Stop Crying Your Heart Out" debuted and peaked at number two on the UK Singles Chart and reached a peak of number six on the UK Indie Chart. It peaked at number one in Italy, and reached the top-twenty in Belgium, Denmark, Finland and Norway. "Stop Crying Your Heart Out" was certified silver by the British Phonographic Industry (BPI) on 12 July 2002, denoting shipments of over 200,000 copies. British singer-songwriter Leona Lewis recorded a cover version for her second studio album Echo (2009). She performed her version on the sixth series finale of The X Factor, and it peaked at number 29 on the UK Singles Chart and number 11 on the UK R&B Chart.

"Stop Crying Your Heart Out" was written solely by Noel Gallagher, and was produced by Oasis. Noel and his brother Liam are the lead vocalists on the track. The song was recorded at Wheeler End Studios and Olympic Studios in England, and was mixed by Mark Stent. It was engineered by David Treahearn, Jan "Stan" Kybert and Paul "P-Dub" Walton. Several instrumentalists were used for the song's melody, including Andy Bell as the bass player, Oasis drummer Alan White, Noel Gallagher and Gem Archer on guitar, and Mike Rowe on piano. "Stop Crying Your Heart Out" is a motivational ballad which lasts for a duration of five minutes and five seconds. Its melodic structure bears strong resemblances to "Slide Away", one of their songs from their debut studio album Definitely Maybe (1994), while its hook is reminiscent of the chorus of their 1996 song "Don't Look Back in Anger". Liam Gallagher "croons" the lines "All of the stars/ Are fading away/ Just try not to worry/ You'll see them some day" as an orchestra plays in the background. "Stop Crying Your Heart Out" was composed in the key of B minor using common time at 76 beats per minute.

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