Here is the full list of all 13 BigFest trophies - there are 2 silver, 10 gold and 1 platinum.
Collect all the Trophies.
Upgrade Stage to Level 4.
Upgrade Security Office to Level 6.
Upgrade Sewage Works to Level 5.
Upgrade Mixing Desk to Level 3.
Upgrade Generator to Level 3.
Remove 50 Trees and Junk.
Headline 5 bands of different genres.
Headline 20 Acts.
Collect 50 Customizations.
Max out a Level 6 Security Office with BigNotes.
Use a Band 10 times in a row.
Use 50 Party Tokens.