Joshua seems head & shoulders above the rest to me. Jessica's good too, I felt the judges deliberately clipped her wings this week in their overly robust critique. Still, now she's got the uptempo number out of the way, she can resume what she's best at. I have warmed to Deandre too, although this week's song didn't show him at his best.
Not getting the Hollie love-in in this forum... She sounds distinctly old-fashioned to me, and while she hits the big notes is no good at the rest, as if hitting the big notes to Celine and Barbara records was all she ever tried to emulate. She has shown no interpretive skills, nothing that makes her stand out as an original, so that to my ears she comes across as karaoke.