Gwen Stefani dropped a brutal new breakup song "Somebody Else's," the first single off her forthcoming fifth studio album, "Bouquet."

Gwen Stefani, whose exes include Gavin Rossdale and Tony Kanal, calls an ex ‘somebody else’s problem’ in new song

On Friday, the "Just a Girl" singer released "Somebody Else's," the next single off her upcoming country-rock album, Bouquet, which details why she had to leave an ex -- and is feeling much better now that he's "somebody else's problem."

Stefani really gets into the details in the chorus, explaining: “Now that I’ve found the real thing / You don’t compare / And I don’t care that you’re somebody else’s

Sept. 20, Gwen Stefani released "Somebody Else's," the next single off her forthcoming album 'Bouquet.' On the track, the No Doubt alum — who married Blake Shelton years after her divorce from Gavin Rossdale — sings of moving on from a "narcissistic" ex.