How to use "costumed" in a sentence

As Tina stood in this beautiful theater, glancing down at the colorfully costumed people milling about on the stage, then looking at Joel's rubbery face, listening as her co-producer unblushingly raved about their handiwork, she was happier than she had been in a long time

Many were still in the communal dressing rooms, while other girls, already costumed, waited in the halls or at the edge of the big stage, talking about children and husbands and boyfriends and recipes, as if they were secretaries on a coffee break and not some of the most beautiful women in the world.

The program opened with an electrifying rendition of "That Old Black Magic." Singers and dancers, brilliantly costumed, performed in a stunning set constructed of mirrored steps and mirrored panels