However, the "Fall in Line" artist admitted her children also inspired her to leave the show.
Released Wednesday (May 16) morning, "Fall in Line" finds the big-voiced singers rejecting the idea that they'll fulfill any status quo or answer to higher authorities.
The new song is taken from Aguilera's forthcoming sixth album "Liberation" set for release on June 15 via RCA Records.
"It's just the way it is / And maybe it's never gonna change / But I got a mind to show my strength / And I got a right to speak my mind", Xtina and Demi sing in the chorus.
Taking to Twitter, Christina praised Demi by saying: "I believe our paths were destined to cross & I'm so proud to come together from the pasts we've overcome; to the strong women we are today!" As a distorted male voice chants "Yea, two, three, right - two, three, shut your mouth, stick your ass out for me, march - two, three, two, three, who told you you're allowed to think?" The song grows in ferocity, as well as in its ambitious vocals, as Demi declares, "You're more than flesh and bones" before two belt and harmonize throughout in a move that seems to solidify Lovato as an undeniable voice of her generation.
The pair will perform the song live for the first time at the 2018 Billboard Music Awards on May 20. Even in that conversation we had, he would go on about other subjects and stuff like that.
And for Lovato, the chance to collaborate was a long time coming.
In an interview with Billboard published on the same day "Accelerate" dropped, Aguilera opened up about her collab with Lovato. "I hope you love this song as much as I do".