Insert a flower's picture on a new layer, above the girl's one.
Erase the background the flower is situated on (
Polygonal Lasso Tool). Applying next the given selection
Edit - Free Transform (ctrl+t) you must place the flower on the girl's hair.
Blur out its edges, using the
Blur Tool. Minimize the brightness and the contrast with
Curves.
You have to create now the effect of falling flower's shadow. It's possible to do that applying next combination:
Layer - Duplicate Layer (ctrl+j). Make the copy look absolutely black with
Image - Adjustments - Brightness/Contrast.
Place this layer under the flower's one, blurring it a little with special filter (
Gaussian Blur). Distort it too with
Edit - Transform - Distort.
Minimize the layer's
Opacity till
34%. Copy the layer with the flower (ctrl+j), create a new one and group both of them:
Layer - Create Clipping Mask (ctrl+g). Paint the upper one in yellow with
Paint Bucket Tool. Merge it down with the
Copy - Layer (ctrl+e) and change the layer's type on
Linear Burn.
Choosing the
Ellipse Tool on a new layer we should represent a lot of small circles of different sizes, close to the girl's eyes. The circles may be equal by keeping pressed the Shift button. Change the layer's type on
Soft Light.
To get a more intensive picture, copy the layer (ctrl+j) and then blur out a little the copy (
Gaussian Blur).
Combine these layers with the girl's layer (ctrl+e) and insert on the top layer the next texture.
Stretch it out on the entire sheet:
Edit - Transform - Distort.
Change its color on the blue one with the next combination:
Image - Adjustments - Hue/Saturation (ctrl+u).
Blur it out with
Gaussian Blur and correct after that the colors (ctrl+u).
Change the layer's type on
Soft Light and minimize the
Opacity till
80%.
Merge down all the layers:
Layer - Merge Visible (shift+ctrl+e) and make use of the
Crop Tool and
Paint Bucket Tool to insert the picture in a frame.