Article continues below advertisementTravis Scott's new song "Rosary" is about something close to his heart: ex-girlfriend Kylie Jenner's b----- implants.The rapper, 34, referenced Jenner's cosmetic surgery in the song he collaborated on with Don Toliver.Article continues below advertisementSource: MEGAKylie Jenner and Travis Scott were together from 2017 until 2023."She look at me like Scotty, man, that S on my chest (Scott, Yeah) / Forty-four five C, the way they sit, I need to test (Straight up)," he raps, alluding to the Kylie Cosmetics founder's chest measurements.