Can I tweeze above the brow area? And how do I fill in the sparse areas in the most natural looking way? When I tried, I ended up looking like Groucho Marx.

I don't know of any reason why you can't tweeze above the brow line as long as you don't tweeze into your natural arch. Follow the technique from part 1 (white out with pencil) so you don't over-tweeze and remove too much hair.

Here are a few more tweezing tips:

• Prep brows by washing and completely drying the area. Don't moisturize until after you're through. You want to work with a non-slippery surface.
  

• Take your time and grab each hair singularly and from the root.
  

• I like to spread the area to be tweezed as flat as possible between the thumb and pointer finger of my left hand as I tweeze with the right. The hairs are easier to grip this way and I've found it to be less painful.

As for filling in eyebrows, you have the choice of working with eyebrow pencil or powder shadow. Here are some tips for applying brow makeup:

• Find a color one full shade lighter than your hair color. This is very important; as you want to gently enhance the brows, not scare people.
  

• If using an eyebrow pencil, sharpen to a fine point first and draw with light pressure in fine, tiny strokes as hair growth (think of minute blades of grass) in the area needed from lower to upper hair (by that I mean draw in the same direction of the hair's natural growth).
  

• If using eyebrow shadow, you'll need a firm flat brush cut on an angle. Dip the brush onto the cake of shadow, blow on it to get rid of excess shadow. Work the brush with light pressure, also in the same direction of the hair's growth.
  

Eyebrow pencil or shadow is also great for delicately lengthening the outer brow or enhancing the arch. The key is light pressure and short strokes; it's easier to add a little than remove a little.

Recommended Products:

Tweezerman Slant Tweezers
Hands down my favorite and their best seller: the slant angle. Comes in stainless steel & colored enamel. Also available in a wide grip; so easy on the fingers!

M.A.C Eyebrow Pencils
I'm so impressed with the sharp, fine line of these pencils, which come in four amazing tones: Flatter (blond/gold), Lingering (fawn), Velvetone (black) and Spiked (brown).
Price: $12.50
Available: M.A.C boutiques and counters, MACCosmetics.com

Estée Lauder Automatic Eyebrow Pencil Duo
This is a classic, all-in-one brow pencil with the pencil on one tip and hard, angled brush for blending on the other. Comes in Soft Blond, Amber, Soft brown, Dark-Brown and Black.
Price: $22.50
Available: Department stores, EstéeLauder.com, Gloss.com

Shiseido The Makeup Eyebrow and Liner Compact
If you prefer a brush on, Shiseido created a small compact containing two powder shadows; combine or use singularly for the perfect tone.
Price:$27
Available: Department stores, Sephora.com

Cle de Peau Beaute Eyebrow Shadow
This is the ultimate luxury in brow color. I love the solid cream texture which makes application a breeze and the accompanying hard angled brush is an excellent tool. Available in four subtle colors of blond, gray, dark brown and light brown, it comes in a palette box which holds two colors so you can blend if desired.
Price: $65 (refills, $16)
Available: Cle de Peau Beaute counters

Chanel Perfect Brow
Contains three brow shades: blond, light brown and dark brown (so you can blend to your heart's content), a small tweezer, and, as if it couldn't get any better, a magnifying mirror!
Price: $67.50
Available: Fine department stores, Gloss.com