How would one assign a different color, say with ColorData["TemperatureMap"], to each circle? I know there is a function Circle, but I'm trying to use a simple example with ParametricPlot.

circle[Theta_, r_] := {r*Cos[Theta], r*Sin[Theta]};
ParametricPlot[Table[circle[Theta, r], {r, 1, 5}], {Theta, 0, 2 Pi}]