Bee Gees In Concert Poster

I noticed this advertising poster on the side of the New Theatre in George Street this morning on my walk to work, I had just heard the news of Robin Gibb's passing on the news before I left the house. The poster is for a cover/tribute band that will be performing on July, it was just a bit uncanny that I happen to notice it this morning.  Question, as the Gibb Brothers started the Bee Gees in Australia, would you call them an Australian Band?

PS.  Look at the shadows on the footpath, we had some sun out this afternoon in Oxford.