How to accept birthday wishes when you don't want any?

So it's almost that time of year again. In a matter of days I'll have my birthday and all of my friends will parade around the school saying "IT'S YOUR BIRTHDAY!!! Let's all SING!!" That is the entire reason why I hate my birthday. I hate people singing, wishing me happy birthday, and giving me gifts for no reason ESPECIALLY when it's for NO reason because I specifically tell everyone not to get me anything unless if it's a nice card(and if they want to put money in it, I'm down). I like giving my friends personal gifts like cards and things but I don't like getting things from them because it makes me feel like theyre only giving it to me because they feel they owe me for my gifts. But the presents and singing and things like that always come. How do I accept them graciously? I don't want to sound like a ***** on my birthday. And how do I get it through my friends thick heads that I DON'T want anything??