Useful Links

Lollapalooza.com
Lollapalooza API sign up
Lollapalooza API Documentation
Lollapalooza API Terms of Service

Other APIs

You are not required to use any of the APIs below but may find them useful in developing your app.

Echo Nest: http://developer.echonest.com

Facebook: http://developers.facebook.com

Rdio: http://developer.rdio.com
Songkick: http://developer.songkick.com

SoundCloud: http://developers.soundcloud.com
Spotify: https://developer.spotify.com
Twilio: http://www.twilio.com/api