Complex sentence: Kitt re-recorded the song, again, for the release of her MAC Cosmetics "Smoke Signals collection", which was showcased on the MAC website in a music video performance, and was played at all MAC locations carrying the collection for the month.
Split into simpler sentences: Kitt re-recorded the song, again, for the release of her MAC Cosmetics "Smoke Signals collection". The new recording of the song was played at all MAC locations carrying the collection for the month.