Kylie Jenner<\/strong><\/a> is officially in her music era.<\/p>\n The Kylie Cosmetics founder, 28, dropped her musical debut, a song called \u201cFourth Strike\u201d in collaboration with pop duo Terror Jr, at midnight on Tuesday, October 14.<\/p>\n Jenner is credited as King Kylie, the alter ego she first introduced to the world over a decade ago, and is featured on a verse near the end of the song.<\/p>\n \u201cOne strike, two strike, let me get the mood right \/ I just wanna tell you I\u2019m sorry,\u201d Jenner sing-speaks<\/a> over mid-tempo R&B beats. \u201cTouch me baby, tell me I\u2019m your baby \/ Write your name all over my body.\u201d<\/p>\n Which Kardashian-Jenner Family Members Have Revealed Their Plastic Surgery Procedures?<\/a><\/p>\n The Kardashians<\/a> star concludes her verse in a breathy whisper, saying, \u201cKing Kylie.\u201d<\/p>\n Jenner previously collaborated with Terror Jr \u2014 David \u201cCampa\u201d Benjamin Singer-Vine<\/strong> and singer Lisa Vitale<\/strong> \u2014 in 2016 when their song \u201cThree Strikes\u201d was featured in a Kylie Cosmetics lip gloss commercial.<\/p>\n At the time, fans speculated whether Jenner was secretly the group\u2019s lead singer, as the band\u2019s identities were anonymous until the release of their debut EP, Bop City, in October 2016. In November of that year, however, Jenner confirmed via Snapchat that she was not part of the band.<\/p>\n \u201cAHHHHHH!!!!!! FOURTH STRIKE!!! terror jr ft KING KYLIE!!!!! OUT NOW EVERYWHERE! what is happening!!!\u201d Jenner shared in an Instagram<\/a> post announcing the release of \u201cFourth Strike.\u201d<\/p>\n Courtesy of Kylie Jenner\/Instagram<\/span><\/p>\n She continued, \u201cThere was a little rumor 10 years ago that I was the one actually singing on 3 strikes! It wasn\u2019t me (wish it was) so I had the idea to come together for fourth strike and it would actually be ME FEATURED! @terror.jr thank you for making another perfect song and for trusting me to actually ft on this! I was soooooo nervous but so grateful.\u201d<\/p>\n Alongside the caption, Jenner posted snippets of her recording her verse in the studio, as well as playing the song for her friends and her kids. In a sweet video, the star\u2019s two children \u2014 daughter Stormi, 7, and son Aire, 3 \u2014 are seen in a car with their mom as the song plays in the background. (Jenner shares her two children with rapper Travis Scott<\/strong>.)<\/p>\n On Monday, October 13, Jenner teased her musical debut when she released a commercial<\/a> for her new King Kylie cosmetics collection featuring \u201cFourth Strike\u201d in the background. The video serves as a sequel to the 2016 lip gloss commercial she released in collaboration with Terror Jr.<\/p>\n Jenner announced the King Kylie collection, featuring \u201cfan favorites and new products,\u201d according to Kylie Cosmetics<\/a>, in an Instagram post<\/a> on Sunday, October 12.<\/p>\n<\/span><\/div>\n