"Last Night" is the first song to achieve season-end No. 1 status on the Songs of the Summer chart.
Shania Twain's "You're Still the One" came close in 1998, ruling Hot Country Songs.
Morgan Wallen's success with "Last Night" highlights its popularity across multiple charts.
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It is noteworthy for a country song to excel on both the Hot 100 and Songs of the Summer charts.