Don't know about you, but I like visual examples. Many different body shape systems use celebrities to show how the shapes look like. I just thought that I could make a list with celebrities who represent all 5 YLF shapes (and secondary types too). It's harder than I thought, because many pictures are photoshopped and celebrities tend to lie about their measurements. I couldn't find examples for some shapes and I'm sure that I'm wrong somewhere. Feel free to correct me

Here is what I've made so far:

Hourglass - Sophia Loren
Hourglass/IT - Catherine Zeta-Jones
Hourglass/pear - Kelly Brook
Hourglass/apple - Jennifer Hudson
Pear - Alicia Keys
Pear/rectangle - Trinny Woodall (although I believe that her rectangle tendencies are an effect of being tall and skinny)
Pear/hourglass - Beyonce
Apple - Roseanne Barr
Rectangle - Anne Hathaway
Rectangle/hourglass - Gwyneth Paltrow
Rectangle/IT - Cameron Diaz
IT - Demi Moore
IT/hourglass - Tyra Banks
IT/rectangle - Jessica Alba (she claims to have 34-24-34 measurements :D)