Where was Katy perrys first concert?

Answer 1

Warped Tour she started with, but there were many other performers with her the real first one should be HELLO KATY You can find extra information from wikipedia...

But shortly the answer is this:

Start date January 23, 2009End dateNovember 28, 2009

Answer 2

Her first concert was in the lost city of Atlantis, at the time of cavemen and dinosaurs.

Answer 3

a madonna concert back in 2000