The lead singer is required
The first photo owns the person at the desk, including the opening group view and the later close-up. Hair, clothing, and accessories travel with the face. You do not need the source cap or hoodie unless you want them.
Use a picture where the eyes, hairline, and neckline stay readable when the camera moves in. One person only. Permission is required for the person you upload. A specific likeness is not assured.
Four bandmates, each optional on its own
The saxophonist, the keyboard player, the left backing singer, and the right backing singer each have a slot. Fill only the ones you want to change. Empty is a finished choice, not a missing step.
Left means the white-shirt singer behind the keys as you see the group. Right means the red-shirt singer on the other side. Those labels stay with the person through later angles. You can replace the right singer without touching the left, and you can replace the sax without touching the keys.