American Girl x Megan Moroney 18-inch doll. Mattell/American GirlCountry music superstar Megan Moroney is collaborating with Mattel’s American Girl doll brand with a new doll and a line of accessories for release later this year. According to Mattel, the doll from American Girl x Megan Moroney collection will be available exclusively on Target.com on Nov. 22 and in Target stores early December. (Photo by Michael Buckner/Variety via Getty Images) Variety via Getty ImagesAdditionally, the accessories for the American Girl x Megan Moroney collection will be available to pre-order on the American Girl retail site on Wednesday, and upon release, will also be available in American Girl store locations nationwide. American Girl x Megan Moroney guitar and mic stand, outfits and accessories.