如何显示拥有最多歌曲数量的歌手的姓名

Hi I am beginner and i want to Show that singer name who has maximum number of songs in songs table but i failed to do this because subquery cannot return two values at a time. how can i solve this problem. Below code shows this error -> Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.Hi I am beginner and i want to Show that singer