It's nearly impossible to describe Rihanna's chameleon-like style, but if there's one thing we do know about it, it's that this A-lister can pretty much slay any look. True to form, the rebellious star took yet another bold beauty risk at last night's Brit Awards, and predictably, RiRi easily pulled it off. The "Work" singer looked striking with shimmering cheeks, slender brows and lavender frosted eye makeup reminiscent of all our favorite '90s makeup moments. Normally, we'd toss aside any…