Thomasina Petrus sings in tribute of Jazz icon Billie Holiday. But Thomasina’s kind of tribute is to sing great songs as Billie might have sung them. The concert is Sunday April 9 at the Dakota at 6PM. Then Thomasina plays Billie in a stage production Lady Day at Emerson’s Bar and Grill, starting April 21 at the Yellow Tree Theater in Osseo. Thomasina talked with Phil Nusbaum, but first, Thomasina sings a bit of a Billie song, “Don’t Explain.”