Select your Custom Shape Tool.
Open your Custom Shape picker in the Tools Options Bar (at the top) and select the twisted star shape.
Set the fill color to the color you want.
Create your star on the canvas.
Go to FILTER > RADIAL BLUR then click
It will ask to rastorize the layer, say yes.
You could also use the twisted star shape to make a selection.
Turn off the Star shape layer (click the eye).
Create a new layer and leave it highlighted.
Hold the Cmd/Cntrl key and click on the twisted star layers thumbnail.
Go to SELECT > MODIFY > FEATHER feather the selection about 1.8
Select your Brush Tool, select a color and paint away!