Anyone who follows Kelly Clarkson [1] on Instagram was left scratching their heads on Sunday night thanks to three cryptic uploads to her account [2], but now the mystery has been solved! The "Piece by Piece" singer [3] posted two videos and one photo that all had clues hinting at a new project, which involved her super cute daughter [4], River Rose, and now we know why: Kelly wrote a children's book [5] all about her. She posted a final video on Tuesday with the caption, "I'm officially a children's book author! River Rose and the Magical Lullaby comes out this October! #NewProject." So exciting! Keep reading to see each of her Instagram posts leading up to the announcement, and check out the hilarious moment River met Santa [6].