Kaela Sinclair

After a year as the voice of M83, Kaela Sinclair is poised for solo success

Singer-songwriter-keyboardist Kaela Sinclair was working on her second album and teaching vocal lessons in Texas when she saw the tweet. It was February 2016 and Anthony Gonzalez, the mastermind of French synth-pop group M83, was looking for a new female singer and keyboardist to join his band for their upcoming world tour. Before she knew it, Sinclair's friends were urging her to apply.

"I thought that because I wasn't in L.A. and wasn't in New York, it wasn't something that would...