Summary: Gary and Trevor, along with Billboard.com senior editor Andrew Unterberger, look back at 2018's most surprising hits, biggest memes, most notable videos and more. Plus, guest DJ Earworm on his latest "United State of Pop" mash-up. <br><hr><p style="color: grey;">See <a style="color: grey;" target="_blank" rel="noopener noreferrer" href="https://acast.com/privacy">acast.com/privacy</a> for privacy and opt-out information.</p>
