Great question, aromaworks. Touche Éclat ($40), is the crème de la crème of highlighters (see a few tips on how to use it here). It was even used on the set of Almost Famous to give Kate Hudson her youthful glow. But at $40 a pop, it's quite pricey. For some cheaper alternatives, I recommend Maybelline Instant Rewind or Jane Iredale Active Light Under-Eye Concealer.
What say you, readers? Have any suggestions? Share your bargain finds in the comments below, and be sure to hit up other looks for less in our Beauty Dupes group while you're at it.