The singer revealed the track list for her upcoming album on Tuesday, which looks like it will include 12 songs – one of which is her recently released hit single "Used to Love You".
"This Is What the Truth Feels Like…," Stefani, 46, captioned the photo of the handwritten note.
In November, while promoting her single, the Voice coach shared in a radio interview that she considered losing love the theme of her new album, calling "Used to Love You" her "truth."
"I would consider it a breakup record," Stefani said. "It just makes me believe in God and my journey. My cross to bear was to go through these heartbreaks and write these songs and help people."
While the mother of three has been open about what inspired her new album, she hasn't shared a release date, saying only that the much-anticipated music will be out early this year.