Overview: The second half of the 1990s launched huge careers for the biggest names in pop, rap, hip-hop and rock music. This episode celebrates the greatest hits of the musical era from 1995-2000 with never-before-seen collaborations with Backstreet Boys & Meghan Trainor, Coolio & CeeLo Green, Jewel & Tori Kelly, LL COOL J & Wiz Khalifa and an unforgettable acoustic performance by Hanson.