I love seasonal collections from the various cosmetics companies, but one of my favorites has to be Physican's Formula and their Happy Booster line.  Something about the little hearts (see closeups here and here) and the shimmer really bring a pick me up to the daily routine in the gloomy winter months.  Plus, the colors are so bright and cheerful after deep vampy shades that tend to take over fall and winter. 

 

This January Physician's Formula has introduced the Sexy Booster line, which is a collection of lip glosses, bronzers and blushes.  These are decorated with high heels and bustiers, which is quite cute.