There are two artists with this name. 1) Funk/disco band from London, UK. 2) Synthwave artist from Germany.
These are photos from concerts where Heatwave played, so they may be of other bands that played the concert as well.
Glastonbury Festival 2011 Jun 22 - 26, 2011 Shepton Mallet, England, United Kingdom Uploaded by A Badger Faced Man