Renee Lucas and Eric Gabriel on Heidi Klum on AOL  Are you looking to add some color and dimension to your hair? What about volume and length? Maybe some face-framing layers? Our hair expert Eric Gabriel shows us how to solve these hair problems with the use of extensions! We've got you covered from start to finish with hints on finding the right extensions for you, tips on secure strands, and a lesson on styling your hair once they're in.