Katy Perry knows online critics ... is important to me,” the “Firework” and “California Gurls” singer said Tuesday on Instagram. Perry, 40, wrote about how she moves past online scrutiny ...

It was one small step for Katy Perry ... with hits like “California Gurls” featuring Snoop Dogg, “Firework,” “E.T.” and “Last Friday Night (T.G.I.F.”). Perry — who said before ...