The iHeart Radio Jingle Ball lineup drops tomorrow and the MIXTAPE 317 team can’t wait to see who will perform on the iconic holiday stages around the U.S. this year. Here are the artists we'd love to see this year on the Winter Festival! Photo iHeart Radio ADÉLA - EC's Pick ADÉLA has been on an unstoppable rise this year. She opened for Demi Lovato on the It’s Not That Deep Tour, got fans buzzing at festivals like Lollapalooza and Reading & Leeds, then debuted at #4 on the B