Stela Atanasova: First of all, a perfect song has to combine lots of structural elements. It has to use beautiful vocal lines, complex harmony structure, unusual chords sequence, mystic lyrics, lots of backing vocals, different parts with tempo changes and changes in measures, interesting guitar riffs and complex drums. The perfect song to me is the one which makes you cry and laugh at the same time – it has to touch your heart and fill your sensitivity with all the desirable aspects of the human soul.
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