Tutorial No. 2. //Feat Gwen Stefani

Going from to =]

Step One. Crop your base; 
Duplicate the image and set to SOFT LIGHT adjust around the opacities to your liking 

Step Two. Merge all of the layers into one layer. Layer > Merge Visible. Then Sharpen. 

Step Three. Layer > New Adjustment Layer > Brightness/Contrast. Click OK. Brightness: -32 Contrast: +26 

Step Four. Layer > New Adjustment Layer > Selective Color. Click OK. 
Reds: Cyan: -87 
Magenta: -11 
Yellow: +21
 Black:+34 

Yellows: 
Cyan: +100
 Magenta: +70 
Yellow: +100 
Black: -28 

Neutrals: Cyan: +62 
Magenta: +44 
Yellow: +42 
Black: -36 
then click OK. 

Step Five. Make a new layer and fill it with the colour #FEF161 and set it to MULTIPLY opacity 24% Then using a small eraser; erase out the skin colour. 

Step Six. Make another new layer and fill it with the colour #170C46 and set it to EXCLUSION opacity 100% 

Step Seven. Duplicate the base layer and drag it to the top. Set this layer to SOFT LIGHT opacity 100% 

Done!! =]
*for more tutorials; etc; visit my website here