Glen Keane is my all time favorite animator--he did the Beast, Ariel, Pocahontas and Tarzan to name a few, and here, Tangled which being the director at the beginning, gave a lot of influence to the art direction:)
Ariel concept art The Little Mermaid
OMG Minion concept art sketch by Sandro Cleuzo for the Despicable Me ride at Universal Orlando park. - SQUEE!
OSOKARO: SENTENZA IV
Character Shape Sketching 2 (with video link) by LuigiL.deviantart.com
facial 45 120001 by *styloide on deviantART
Academy of Art Character and Creature Design Notes: Foot Reference