It looks like Katherine Heigl is keeping her hair short and we love it. This versatile 'do can be worn straight or as Katherine shows us, with volume and carefree curls. To recreate her look, use a medium-barreled curling iron to add bends to the shorter layers and curl to the longer lengths. Next, backcomb a little along the front hairline and tousle all tresses with fingertips instead of combing. To finish the look, use fingers again to sweep hair back and spray with a medium-hold…