A tutorial with the lovely Nicole Kidman in Moulin Rouge (isn't it a good movie?)
1. Duplicate base and set to screen 100% (or to likeing)
2. New adjustment layer > selective color
Reds: C:-100 M:+100 Y:+100 B:-20
Yellows: C:+100 M:-40 Y:-100 B:-20
Whites: C:-65 M:-45 Y:+25 B:-30
Neutrals: C:+60 M:+60 Y:+30 B:-20
Blacks: C:+40 M:+30 Y:+15 B:+40
3. New adjustment layer > color balance
Midtones: -15 +20 +15
Shadows: +35 +23 +35
4. New adjustment layer > selective color
Reds: C:+14 M:0 Y:+21 B:0
5. New adjustment layer > hue/saturation
Saturation: +8
And there you have it ^_^
Comment and tell me what you think! I'd like to see what you come up with!