Hairdressers have huge hearts, as demonstrated by the success of last year's Charity Challenge winners. And thanks to the second annual Wella Supports Your Cause Charity Challenge, another deserving group of stylists will receive the funds to take their charitable efforts to the next level. Wella has named the 20 “Challenge” finalists, who will receive a total of $43,000 in grants for demonstrating compelling dedication to community outreach programs. The grants will include a $10,000 grand prize, two first prizes of $5,000, four second prizes of $2,500 and 13 third prizes of $1,000. The winners will be…