It's a Boy Band from Down Under...

 ... where sheila shrieks drown the thunder!

And that Boy Band is the Bee Gees in 1963. Here they are, performing one of their hits in that fabled land of Australia.

(Until shortly before this post, we here at Shades of Gray had no idea that the Brothers Gibb got their start performing while they were still in their early teens and younger. In fact, the Bee Gees [originally the BGs] was the third group they had either performed as or as part of.)