Hey lady! Lady? Ms. Gaga? Mother Monster? Gagariffic?
Anyway, as far as celebs go, you're really tech-savvy. I mean, some of them don't even know what the internet is (and others think they invented it), so the fact that you already have a mobile game and 10 million Twitter followers and a digital scavenger hunt is pretty impressive. I'm honestly not sure where you find the time to do it all, between fashioning your hair into a giant bow and touring worldwide and stuff.
Anyway (oops, I already said that! I get nervous talking to celebrities), I had a couple of ideas for you. I work on Microsoft Tag and we here think it's pretty great. Some other musicians have used it and it would be really cool if you did too. I'm not making this up. You could put Tags on the back of your albums to link to a store where people can buy your mobile game. Or you can use the location feature to connect fans with a site where they can buy tickets to your tour stop that's closest to them. Or you could use it to drive traffic to your Facebook game, GagaVille, or your new social network (seriously, when do you sleep?!).
I know you've used QR codes before, but with Tag analytics are built right in, it's totally free, and you can customize the barcode with a purple unicorn design or your latest album cover or something. I mean, it's really up to you. You're creative so I don't want to limit you. Maybe you could link it to an e-commerce site where people can buy purses made out of insect wings or something.
That's really about all I had to say. I'll get back to listening to Born This Way now.