Jem Aswad Senior Music EditorA Michigan nurse whose informal performance of “Amazing Grace” at a local hospital became an online sensation last year will sing at a memorial for those who have died from COVID-19 on Tuesday (Jan. 19), ahead of President-elect Joe Biden’s inauguration.Lori Marie Key, 29, of Belleville, Michigan is set to sing “Amazing Grace” as part of the tribute ceremony to be held at 5:30 p.m.