I'm turning 20, I don't know what I want?

I'm 19 years old and I'll be 20 in two days. My question is, what should I get for my birthday? I have no idea what I want whatsoever. (Usually when people ask me what I want I'll say "Surprise me" or "It doesn't matter"). I'm not really a picky, choosy type of person. I'm usually the type that's eternally grateful no matter what. (It could be a card, letter or even someone simply saying "Happy Birthday" and I'll still be grateful no matter what).

But the thing is, my Dad keeps asking me what I want and told me I have to come up with "actual things" by today or tomorrow. My mom told me that she's going to get me something else too since she already purchased something and it's hidden in the house somewhere. (I'm not gonna try to look for it, because that will take the fun and suspense out it).

For Christmas, My parents bought me an Xbox kinect with a couple of games, bought me some wii games and an iPhone 5, but the last time I played the videogames was during Christmas lol. I've been really busy with writing papers back to back and it can be kind of strenuous at times. But I will be free during this summer.

So what should I get? What's out there that's a hot seller? (Sorry if this sounds cheesy lol) I'm an online student, so I really don't have the opportunity to go out and see things. I know, I like music and singing, I plan to record my own someday and become the next pop sensation. (But software and all that recording stuff, is expensive and adds up). My mom told me to ask my dad for a tablet. But I already have an iphone and they're pretty much similar, I think. (Correct me if I'm wrong). Can someone please help me figure out some ideas? I would really appreciate it.

Mabee a voice recorder or a recorder to record your voice and Mabee sometime you can make professional recording my birthday is tomorrow and I didn't know what I want lol so I just saw my hobbies and added some things so hope I helped!