Home Jambase Umphrey’s McGee Continues Halloween Mashups Tradition In St. Louis – Full Show...National Music NewsJambaseMusicUmphrey’s McGee Continues Halloween Mashups Tradition In St. Louis – Full Show AudioOctober 31, 2016940FacebookTwitterPinterestWhatsApp Three new original mashups were debuted last night at Umphrey’s McGee’s Halloween celebration at The Pageant.