(literary) they (about women or girls)

utattemita, a class of music where 歌(うた)い手(て) (utaite, “amateur singers”) cover songs

past of 歌ってみる (utatte miru, “to try to sing”): tried to sing

(figuratively, uncommon, possibly archaic) describes a state of having few visitors, of being lonesome, desolate, or unpopular, especially in business