6 Celebrity BFFs Who Went To War With Each Other

Rihanna and Katy Perry were once the ultimate pop queen duo. The two superstars would sit together at the VMAs, cheer each other on when performing at the GRAMMYs, visit each other on tour, party together and support each other publicly, however things seem to have maybe turned sour in recent years.

Their public friendship has been very distant for a few years now, so fans assumed they were just more private as they got older. However, after Katy said her dream American Idol judge would be Rihanna, the Fenty Beauty mogul