American singer/songwriter Michael Constantino built his following with savvy social media self-promotion and themed mashups of popular songs that resembled a DJ Earworm production with an in-house cover singer. Boston-bred and Los Angeles-based, Constantino scored his first viral hit in 2016 with "2000-2016 Mashup," which blended covers of snippets from tracks by Adele, Macklemore, Carly Rae Jepsen, Bruno Mars, and more, set atop SeeB's remix of Mike Posner's "I Took a Pill in Ibiza." That same year, a flurry of mashups were also released, including "2015 Mashup," "2016 Mashu...