As an entrepreneur, mother, actress, musician, and red carpet glamazon, Jennifer Lopez is a force to be reckoned with. Her risk-taking style has served her well in her ever-growing career and business endeavors, but we can't overlook her bold, no-holds-barred choices on the red carpet, either. Who could forget the belly-button-baring Versace number she wore to the Grammys in 2000? The gorgeous actress — who highlights her enviable assets in labels like Roberto Cavalli, Versace, and Zuhair Murad — is continually surprising us in bright colors, allover sequins, and body-conscious cuts. Today, the singer/actress/businesswoman extraordinaire is turning 45, and we're celebrating the fearless, sexy style of Jennifer Lopez with a look back at some of her memorable moments on and off the red carpet.