WHY did she perform Roar on XF. If she'd done Unconditionally she could've at least scraped a few more sales. At least we haven't heard that song about 1000 times before.
Tbf, Rihanna is similar to Princess Di status in the U.K so her sales are expected.
Kathryn performed on X.Factor which has been receiving low ratings for a while now. Plus she's never been that huge over here, you DO call her local for a reason