Terror Jr is a dark electropop trio who emerged under an air of mystique in 2016. When the group's debut single, "3 Strikes," appeared in a three-minute Kylie Jenner makeup commercial that spring, it led to rumors that the reality TV celeb might be the unknown band's lead singer. (The band and Jenner later dismissed the rumor on social networking.) It was soon revealed that two of the group's founding members were established pop/EDM songwriter David Singer-Vine, aka Campa of the Cataracs, and producer/electropop artist Felix Snow. The pair met in 2014, then reconnected a year...