Viewers trying to figure out exactly how "Duets" (Thu., 8 p.m. ET on ABC) may be starting to put the puzzle pieces together. This week, no one went home again, but there will be eliminations next week. But in an interesting and unforeseen twist, John Legend got the chance to inject his team with some new blood.Johnny Gray left the show for what was only described as "personal reasons" leaving Legend a contestant short.