Hòutái de huàzhuāngshì lǐ bǎimǎn le gèzhǒng huàzhuāngpǐn.
The backstage dressing room was filled with all kinds of cosmetics.
Tips
usage
化妆室 is used both for theatrical/TV dressing rooms and politely for restrooms/powder rooms (especially in formal settings in Taiwan). In mainland China, 洗手间 or 卫生间 are more common for restrooms.
