The tour, which kicks off on Friday, July 6 in Detroit, will feature this year's Top 10 finalists DeAndre Brackensick, Hollie Cavanagh, Colton Dixon, Heejun Han, Skylar Laine, Joshua Ledet, Phillips, Jessica Sanchez, Elise Testone and Erika Van Pelt.
© Fox / Michael Becker
"It's going to be a lot of fun at the beginning, and then probably a few weeks into the tour - I give it about six weeks - people are probably are probably going to want to cut each other's throats and get mad at each other," Phillips told Billboard.
"I hope it doesn't get that way, but I have a feeling it might be, because we're gonna be tired from doing interviews and just wanting to sleep.
"Heejun is probably gonna be really messy; I might be a little messy, no lie, but I try not to be. It's gonna be a long summer."
Phillips is currently preparing for his debut album, planned for a November release.
Watch Phillip Phillips perform on American Idol below:
