<P> For the score, Bates used a distorted guitar run through a wah - wah pedal, microsynths to add "unique colors", and a choir . The choir originally sang "meaningless, faux - Latin phrases" for an aggressive vocal cue, which was being recorded on a day that Leitch was visiting the 20th Century Fox recording studio . Bates discussed with Leitch potentially replacing the nonsense phrases with scene - appropriate lyrics, and the pair worked during a 20 - minute break in recording with choral contractor Sally Stevens and orchestrator - conductor Tim Williams to write the new lines . The lyrics they wrote, which follow the rhythm of the original music, include "you can't stop this motherfucker" and "holy shit balls!", which ultimately earned the score a parental advisory warning . It is the first score album to receive such a warning . Bates felt this was not "merit-less debauchery, it was just fun . It's very rare that we can work on something at such a high professional level that embraces the irreverence of Deadpool ." </P> <P> Leitch felt that retaining the personal stakes of the first film by focusing on "an existential crisis and a deeply personal cause" for Deadpool was going to be more compelling for audiences than trying to build the film around global stakes, and as part of that he wanted to create an original song for the film that served as an emotional through - line for the film's characters in the vein of "Take My Breath Away" and "My Heart Will Go On". He and music supervisor John Houlihan "ended up discovering" the song "Ashes" as written by Petey Martin, Jordan Smith, and Tedd T. After further discussions between Leitch and Reynolds, the latter asked Céline Dion to record the song for the film . The soundtrack also features an original collaboration between Diplo, French Montana, Zhavia Ward and Lil Pump called "Welcome to the Party". </P> <P> As explained by co-writer Reese, the song "We Belong" by Pat Benatar was used in the film to illustrate the theme of family that they were exploring, and was almost used a second time during the X-Force parachuting sequence but was replaced with AC / DC's "Thunderstruck" which was used as a "pump me up" song--because of its "straight" tone and use in Iron Man 2--to help sell the excitement of the audience before the X-Force characters are unexpectedly killed . While writing the film's score, Bates was kept aware of the licensed songs that were being used in conjunction with his music because he felt it was "paramount" to his understanding of the film and Reynolds' intentions for it . He also attempted to compose the music on either side of each song in such a way that it could augment the songs and elevate their intended effects . </P> <P> "Ashes" was released as a single by Columbia Records on May 3, 2018, along with a music video directed by Leitch . "Welcome to the Party" was released on May 15 . </P>

Who sings the x force song at the end of deadpool 2