"I Stay in Love" is a song by American singer and songwriter Mariah Carey from her eleventh studio album, E=MC² (2008). It was written and produced by Carey and Bryan-Michael Cox, with additional songwriting from Adonis Shropshire and Kendrick Dean. It was released by Island Def Jam on October 28, 2008, as the fourth single from the album.

"I Stay in Love" was written and produced by Mariah Carey and Bryan-Michael Cox, with additional songwriting from Adonis Shropshire and Kendrick Dean, for Carey's eleventh studio album, E=MC² (2008). Carey produced the track for Maroon Entertainment and by Cox for Blabby Inc. Copyright is held by Rye Songs which is administered by Songs of Universal (BMI)/W.B.M. Music Corp. O/D/O itself and Songs in the key of B Flat/Noontime South/EMI Foray Music O/B/O itself and Phoenix Ave. Publishing/Christian Combs Publishing (SESAC). The song was recorded by Brian Garten at Stone Groove Studios in New York, and mixed by Phil Tan for Riotproof Productions, Inc. All instrumentation was performed by Cox, while Carey sung all the lead and background vocals. In an interview with Ed Lover for the radio station Power 105 in New York City, Carey revealed that the song was one of her favorites from the album and that she recorded her vocals within a day. Following the commercial underperformance of the album's third single, "I'll Be Lovin' U Long Time", "I Stay in Love" was released as the fourth single from E=MC². In the United States, it was serviced to mainstream, rhythmic and urban radio stations on October 28, 2008. A four-track EP consisting of remixes by Jody den Broeder and Ralphi Rosario was released in the United States on December 16, 2008.

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