You can enter Rimmel London’s #ModMonday contest by sharing your retro-inspired looks on Tumblr, Instagram or Twitter. The grand prize is a round trip for 2 to NYC to see Britain’s hottest boy band in concert as well as a hair and makeup package! Don’t miss out, the contest ends on 4/14! You can find all the details out here!Disclosure: This post was sponsored by Rimmel London through their partnership with POPSUGAR Select. While I was compensated to write a post about Rimmel London, all opinions are my own.