Update: Shimmer Sheers appear to be out of production. I suggest trying the Lorac product listed, which is not as shimmery, but is a nice luninizer.
I mentioned Neutrogena Shimmer Sheers in my review of Revlon's Cream Blush, so I thought I would post a bit more about it.I find the shimmer sheers to be a pretty good way to add a subtle shimmer anywhere on the face without going overboard. The product is more than a highlighter or luminizing cream, such as LORAC Luminizer because it has some definite color to it. But it is still quite sheer and subtle. I like to use mesmerized, a very light pink shade, on my cheek bones under a generally matte blush. I also have used it on my brow bones. I haven't tried on my lips, but it could work for shimmer there too. I suggest trying it over a lip stain. Overall, it is a fun and inexpensive way to add just a bit of subtle shimmer anywhere you want it.