This mall brand tank top found at a thrift shop had a rich color but originally lacked pizzazz. I added matching feathers–intriguing on their own, or peeking out from under a blazer or jacket. Sheer, pleated fabric.
To replicate this style for yourself, choose a swingy tank with flowy material (reused if possible), find a trim you love (about 14" long) and ask any tailor or seamstress to affix the trim (estimated cost $10-15). Or try sewing yourself with straight line machine stitching.