JCPenney is showing that size isn't a measure of a person's worth in its new brand campaign, Here I Am. The department store features accomplished women like fashion blogger GabiFresh, designer Ashley Nell Tipton and other body activists in a commercial promoting body positivity. "In high school I was one of those girls who said, 'I would be so much prettier if I was thin,' " says GabiFresh in a video for the campaign. "If I could just reach that one last level my life would be perfect." But she has since realized size is not important. "The only person...