There are (or were) at least 14 bands called Empire including a podcast produced by the UK film magazine Empire.
These are photos from concerts where Empire played, so they may be of other bands that played the concert as well.
Big Guava Music Festival 2015 May 8 - 9, 2015 Tampa, Florida, United States Uploaded by Raúl Castillo
Big Guava Music Festival 2015 May 8 - 9, 2015 Tampa, Florida, United States Uploaded by Mgilberto1007
Big Guava Music Festival 2015 May 8 - 9, 2015 Tampa, Florida, United States Uploaded by Leets