Avril Lavigne just announced her engagement to Nickelback's Chad Kroeger, and since she's always trying trendy hair hues, we're excited to see the style she chooses for her walk down the aisle. "I love using green hair color, and pink," she told InStyle.com at the launch of her Sally Hansen nail strips. "I'd always color my hair for real so it wouldn't come out, but now there are more temporary options." And you can get Lavigne's look temporarily, too! We added her subtle rainbow highlights to our Hollywood Makeover Tool. Simply upload your picture, and voila—instant technicolor streaks, no dye required. Get started with the link below.