The 25-year-old rapper told Billboard.com his 2007 international tour will also feature supporting acts that will match the current musical trends in each region of the world tour.
"I took her back to her 'No Doubt' days a little bit; more '80s," Akon said regarding his work on Stefani's single "The Sweet Escape."
"I'm working on more up tempo records for her," the rapper explained of his work with Houston. "She's been through a lot and has a dark history. So we've got to make the album brighter because she's come out of the cave now. She wants a celebration. She needs to come back to the old Whitney we remember."
Notable deaths of 2014 [PHOTOS]