Tarte Cosmetics has appointed Samantha Kitain, formerly senior vice president of sales and marketing, to the role of chief marketing officer.   “After nine years at Tarte, I'm still so impressed by our ability to grow worldwide while staying true to our values of being cruelty free, using naturally-derived ingredients and giving back,” said Kitain. “I'm grateful for the opportunity to play a key role in tarte's future.”   Under the leadershi...