By Brandy McDonnellGrammy Award-winning international pop icon P!NK has announced that collaborator and Grammy-nominated singer-songwriter Julia Michaels will join her "Beautiful Trauma World Tour" as the special guest in 2019. Michaels worked alongside P!NK to write the strikingly honest track “Barbies” and the melancholic song “For Now” from P!NK's sevent studio album, "Beautiful Trauma.Read more on NewsOK.com