KATY PERRY SAYS "T.G.I.F."

1) For the fanatic in most people. OPI offers a line of polishes branded and endorsed by Katy Perry (the "Kary Perry Collection") and Serena Williams ("Serena Williams Grand Slam"), which are usually hugely popular aside from due to their name, but the products and color permutations. You can wear OPI polishes with confidence - leading salons use t