I think seperate tours with opening acts will be good. A Brandy and Chris Brown Collabo would do. i m not for the idea that the girls do a tour together, given that they both need more than each other for their comebek. they should ride on with a mainstream artist and do a world tour, thts it. Tyrese is r n b but how many fans does he have? They can invite him for a cocktail bar perfomance.