First off, if you aren’t lucky enough to make it to the weekend show, or for some reason only make it for one day, then you will be able to stream the event live via YouTube. It is still a few days out, so you might just want to bookmark this link for now - http://www.youtube.com/lollapalooza –
Secondly, to help get you in the spirit of things,  Google Play Music is offering up a free track from 20 of the artists schedule to perform this year. Such as Red Hot Chilli Peppers, M83 and many others.
Not sure about you guys, but we love free music, especially legal offered free music. If you feel the same way, pop over to the Play Store now and pick one, two or all of them up while you still can.