It is my birthday month and suddenly all the retailers ever are giving me deals. It's great, but what do I buy?

Sephora has a NARS lip set for birthdays this year. I need new makeup brushes. But which ones? Ulta is giving me double rewards. But what do I want? Express sent me an email that they're giving me the exact amount I need for the owl shirt I have been eying. Do I still want it?

Help me spend money, GT!