I did this one a while ago, because I was feeling festive:
Milani Gems over MAC Something About Pink. This is the new version of Gems, with pink glitter. I don't have Lippmann Happy Birthday to compare, but I think they are pretty much the same except for the fact that the small glitter in Gems is hexagonal and the small glitter in HB is square. This didn't turn out quite as well as I had hoped; I am wearing three coats of each polish but I think it would have looked better with just one or two coats of Gems. I love the new Gems though! The pink glitter makes it more like party glitter rather than a holiday polish.