She wished her a happy birthday. It was a nice gesture. Don't be so irrational. If she didn't wish her one, you'd probably still use it as a way to vilify her.
Everybody, and I mean even every publication/organization has wished her a happy Bday. The memes are hilarious everyone is like "I don't work Holidays". People, HLM, OWN, Verizon, Harvard everyone go to Lipstickalley Beyonce birthday thread it's too funny . She's so beloved and adored it's cute.