Buy as many Beatles albums as you can afford/you don't have.If you don't have any, buy some.
I usually just use giftcards for apps myself. Don't waste it just for the sake of it. Wait until you know what you want or else you are just blowing $25 because its there.
led zeppelindubstep
rolling stones gotmetallica gotstarforgeter got <3half-life ummm, itunes...portal 2 ^^^^^^^^^^the rascals gotred hot chili peppers gotjustin bieber nolady gaga gotkaty ferry nonono