Rihanna is easily one of our favorite celebrity style chameleons. She can rock the heck out of a girly gown with classic hair and makeup, then go grunge with denim, leather, and a fauxhawk the next day. And she makes it all look good. Not to mention her ever-growing list of amazing hit songs! So happy quarter of a century, RiRi! And cheers to many more iconic style moments and albums to come.