Filter>render>clouds
Foreground a dark blue/grey and background black
step 2 of 10
step 3 of 10
step 4 of 10
Adjustment layer solid color with a dark brown. Blend mode to "color".
Painted lights in new layers and added Gaussian blur for the yellow ones and motion blur for the rest.
step 5 of 10
Took a "thing" (I don't know how they are called!) from the piano and distort it. Added girl.
step 6 of 10
New layer on top of everithing, clouds (yes, again!)
To the layer of the "buildings I added an outer glow with an orange color and the size to the highest.
step 7 of 10
For the moon: make a circlw and filled it with white. Added drop shadow...