MAC Radiant Rose Prep + Prime HighlighterMAC Prep + Primer Highlighter ($24) is a pen-style creamy highlighter that brings a sheer wash of color to the skin wherever it is applied. It can be used under makeup to prime and brighten, or on top of makeup to highlight.
MAC Prep + Prime Highlighter is available in (3) shades: Light Boost (soft yellow cream), Radiant Rose (light shell pink) and Bright Forecast (mid tone peachy coral). (You can find swatches of all three shades on Temptalia)
I purchased Radiant Rose, as pink toned highlighters seem to do the best job brightening on my particular skin tone.
Several brand make these pen style highlighters, and I find that most of the time they are pretty expensive for the amount of product you receive. YSL Touche Eclat for instance costs $40 for a 0.10 oz tube. Bobbi Brown Tinted Eye Brightener costs $38 for 0.05 oz and Dior Skinflash Radiance Booster Pen costs $37 for 0.05 oz. They might all be mildly effective, but I personally think they are very expensive for how long they last with daily use.
I was thrilled when MAC came out with a highlighter pen, as MAC tends to be a bit lower priced than most high-end cosmetics. At $24 for 0.12 oz, it's very easily the best value overall, therefore I'm the most willing to purchase from MAC.
MAC Prep & Prime Radiant Rose Highlighter (left) and YSL Touche Eclat #1 Radiant Touch (right). Both are swatched on warm, medium skin (MAC NC30).