Photo: Kevin Mazur/WireImage - Photo: John Ricard/Retna Ltd.
Nail design may not seem like a big deal, but when you get into the elaborate designs that these ladies have on their claws, well, it's a whole different ball game. Katy had Russell Brand's image painted on each of her nails for the 2010 VMAs to mark their first anniversary. (They first met at the 2009 VMAs.) And Nicki had her nails painted shiny gold for an appearance on BET's "106 & Park" back in 2010.