Before highlights were an option, we&#x27;d sneak Sun In with our besties and feel like the peak of chic. The sun&#x27;s rays activate the natural lemon in the new version, yielding a believable, non-brassy glimmer. Sun In Spray-In Hair Lightener, $4.99, ulta.com; John Frieda BEACHblonde Sun Streaks Lightening Spray, $9.99, ulta.com.   - HarpersBAZAAR.com