PopEntertainmentDec 10, 20171 minZ100 Jingle Ball Pre-Show – Hammerstein Ballroom – New York, NY – December 8, 2017 (A PopEntertainmeSabrina Carpenter, Why Don’t We?, Olivia Holt, Alex Aiano, Lauv & James Maslow – Z100 Jingle Ball Pre-Show – Hammerstein Ballroom – New...