"Back to Sleep", also known by the censored version title "Sex You Back to Sleep",^[1] is a song by American singer Chris Brown from his seventh studio album Royalty. The song was released as the album's third single and its first urban single on November 5, 2015. Three official remixes of the song were released during the first months of 2016: The first featuring Usher and Zayn, the second featuring Miguel, August Alsina, and Trey Songz, and the final featuring Tank, R. Kelly and Anthony Hamilton.

The song received universal acclaim from contemporary music critics, noting it as one of the album's highlights, celebrating its production and Brown's vocal performance. Some critics defined it as the best R&B song of its decade. The song received comparisons to Brown's previous singles "Take You Down" (2008) and "No Bullshit" (2011), and also to Marvin Gaye's 1982 song "Sexual Healing", for its similar musical direction. The song became the most successful one from the Royalty album, peaking at number 20 on the US Billboard Hot 100 and number 5 on the US Hot R&B/Hip-Hop Songs chart.

Its music video was released on December 14, 2015, and is part of Royalty music videos storyline, following the conclusion of Brown's "Fine by Me" music video. The videoclip displays an intimate sexual situation between Brown and his loved one.

The song was written by Chris Brown and August Rigo, and was produced by Vinylz and Boi-1da. The song was recorded in 2015 at Record Plant in Los Angeles, California. "Back to Sleep" was premiered via SoundCloud on November 5, 2015, and was sent to radio four days later as the album's third single, also receiving its commercial release for digital download on November 9, 2015.^[2][3][4]

"Back to Sleep" is a mid-tempo R&B slow jam, about late night sex, that features minor influences of funk, and roland TR-808 beats reminiscent of Marvin Gaye's 1982 song "Sexual Healing".^[5][6][7][8] Vibe stated that the song infuses elements of "new school R&B" with "a light dusting of '80s pop".^[9][10] According to Billboard, the lyrical content of "Back to Sleep" features "Brown fresh off a late night flight into town", detailing how he plans to go to his girlfriend's house, wake her up at 3:30 a.m. to have sex with her, then tuck her in for actual sleep.^[7][11]

The music video for "Back to Sleep" was directed by Brown,^[12] and released on December 14, 2015, on his YouTube and Vevo account.^[13]

Brown promoted the song with live performances on televised shows and festivals, including Jimmy Kimmel Live!,^[16] Taraji & Terrence's White Hot Holidays,^[17] the "Lil' Weezyana Fest 2016", and the 3rd iHeartRadio Music Awards.^[18] The song was included on all the setlists of Brown's tours following its release.

Chris Brown has released three remixes to the song. Part 1 features Usher and Zayn,^[19] and was released as "Back to Sleep (Remix)" on February 26, 2016;^[20] in addition to verses from Usher and Zayn Malik, the remix also features a new verse from Brown where he mentions his ex-girlfriend Karrueche Tran and cancels out the rest of the song except the chorus and bridge.^[21] Part 2 features Miguel, August Alsina, and Trey Songz, and was released as "Back to Sleep (Remix)" on April 8,^[22][23] while Part 3 was released on April 10 as "Back To Sleep (Legends Remix)", and features Tank, R. Kelly and Anthony Hamilton.^[24] On August 29, 2016, R&B singer Brandy shared a version of the song with Brown.^[25][26] On July 15, 2016, another remix version was released, dubbed as the "Secret Garden Remix". The song featured previously released verses from R. Kelly, Usher, Tank, and an additional verse from R&B singer and actor Tyrese Gibson.^[27]

"Back to Sleep" received widespread acclaim from music critics. In 2018, the co-host of The Breakfast Club, Charlamagne tha God, defined the song as "the best R&B record in the past 15 years" along with "Adorn" by Miguel.^[28] AllMusic's editor Andy Kellman stated that the track is the best one on the Royalty album.^[29] Brad Wete of Billboard said that it "excels as a quality addition to his catalog’s stellar collection of panty-dropping and baby-making songs", comparing the song to Brown's previous singles "Take You Down" (2008) and "No Bullshit" (2011), and also to Marvin Gaye's 1982 song "Sexual Healing".^[7]

Mikael Wood of The Courier-Journal praised Brown's "great vocal performance" on the track, describing it as "a smooth depiction of genuine sexuality".^[30][31] Soul Bounce called it “The highlight of Royalty” and “a polished, well-produced song that spotlight's Brown's talent”.^[32] Renowned for Sound complimented the song's "impressive vocals" and its production, saying that "the synth R&B arrangement is as smooth as ever", stating that the chorus has a "risqué" sex appeal.^[33] Vibe said that "Back to Sleep" is “a super sexy song”, finding shock value in its sexually explicit lyrics.^[34]

On the Billboard Hot 100, the song debuted at number 64 on the week ending January 2, 2016,^[35] and reached number 48 on the week ending February 13, 2016.^[36] On the week ending March 12, 2016, it reached number 36 on the Hot 100,^[37] and number 2 on the Mainstream R&B/Hip-Hop chart.^[38] On the week ending March 19, 2016, it reached number 20 on the Hot 100 and became the top Digital Gainer of the week,^[39] debuting at number 13 on the Digital Songs chart,^[40] having sold 42,000 downloads that week, 32% of which stemmed from the Part 1 remix.^[41] The same week, it reached number 5 on the Hot R&B/Hip-Hop Songs chart,^[41] number 2 on the R&B Digital Songs chart,^[42] and number 3 on the Hot R&B Songs chart.^[43] By April 2, 2016, the single had sold 300,620 copies in the US.^[44]

• Digital download^[4]

1. "Back to Sleep" (Explicit) – 3:21

• Digital download (Remix)^[45]

1. "Back to Sleep" (Remix) (featuring Usher and Zayn) – 4:27

• Digital download (Legends Remix)^[46]

1. "Back to Sleep" (Legends Remix) (featuring Tank, R. Kelly and Anthony Hamilton) – 3:43