So here are some of Kate's bow adorned necklaces:
And for my nifty inspired version the only things you'll need are:
A strand of pearls (I suggest a basic long version that can be looped 2 - 3 times)
Told ya it was EASY!
One little tip that I have is that to keep my brooch from flopping around through the day, I actually run the pin through a seam on my blouse before clasping the pearls in. This ensures that it will lay flat through the day.