The artists will serve as guest mentors or judges on the competition series, which is hosted by Jenna Dewan, who also is a mentor. The permanent Season 2 judges are Jennifer Lopez, Derek Hough and NE-YO.
"I'm SO EXCITED about mentoring w/ @jennadewan on @NBCWorldofDance later this season!! I'll be on the show 8/22 and 8/29! Everyone be sure to watch! xoP #WorldOfDance," Abdul wrote on Twitter.
"This will be fun!! So excited to be a Guest Mentor on @NBCWorldofDance later this season during Divisional Finals! My episode will be on 9/5 - don't miss it! #WorldofDance," Ciara tweeted.
"Honored to have the lovely @OfficialMelB as my Guest Mentor on @NBCWorldofDance this season! #worldofdance," NE-YO said.
The show has already been renewed for a third season to debut in 2019.