IDEA: some kind of music flyer....

First the Shape of Cornelia was made by using Pen Tool.
Then the brushes was made; one of a guitar, one of Cornelia and one of some circles
The circles was made using the Ellipse Tool - creating a new shape layer and then Intersext Shape Areas to make them empty inside. Then Rasterized before made into a brush
The guitar Brush was transformed kind of upside down by using Brush Tip Shape -157
The Angle Gradient Gray Value Stripes was applied as background added the Angle Gradiant Russell's Rainbow
The "Guitar Girl" text also has a Gradient making it fade a bit into the background - the other text does not fade
The Cornelia brush was transformed by Brush Tip Shape -17
The Circle brush was applied using Scattering 475% and an Opacity at 70%