In Quest mode Special Invitational Events appear randomly and are marked on the map as envelopes. They will always be 'Fanbase' type challenges. Complete Special Events in the following locations to unlock songs.

Unlock 'Healing Vision':
Ontario

Unlock 'Love Me Do':
New York

Unlock 'Stop Violence!':
Missouri

Unlock 'Think Ya Better D':
California

Unlock 'Treble, Bass and Attitude':
Illinois

Unlock 'Cachaca':
Washington

Unlock 'Drivin':
Florida

Unlock 'Koibito':
Texas

In Quest mode when every state in a region is fully coloured, competitions will appear and are marked on the map by a crown. Complete songs in the following regions to unlock them.

Unlock Tir Na n'0g:
Northern Region

Unlock My Only Shining Star:
Eastern Region

Unlock Bongo:
Western Region

Unlock Return of the Toe Jam:
Southern Region

Unlock Xenon:
Canadian Region

Unlock Maximizer:
Nation Championship #1

Unlock Paranoia Evolution:
Nation Championship #2