If you are referring to a music compilation or playlist rather than a research paper, the most prominent "mixes" from that year include:

: A data-driven analysis using RPubs that tracks shifts in "danceability," "energy," and "tempo." It notes a general decrease in positive "valence" in dance music over the decades up to 2019.

: Common tracks found in these mixes include "Old Town Road" by Lil Nas X, "Heartache on the Dance Floor" by Jon Pardi, and "Southbound" by Carrie Underwood.

: Available on Academia.edu, this study investigates how country music consumption interacts with social class and "elite" culture, specifically in the context of festival and dance attendance. 2019 Country Dance Music "Mixes"