Summer 2015 was one heck of a summer for K-pop releases with music comebacks from many of the most popular groups. Now that summer is officially over (unfortunately) let's take a look at Billboard's list of the best K-pop songs that charted on their 'World Digital Songs' chart and the most-viewed K-pop MVs this summer!

Billboard announced the top 20 K-pop songs that charted on the weekly 'World Digital Songs' chart during this summer from June 13 to September 19, and of course, the most-viewed K-pop MVs this summer are self-explanatory. 

There were a lot of groups that made it to the top 20 on both lists, but Big Bang was the group that made it to #1 on both lists for "Bang Bang Bang"! In fact, all 8 songs the group (incl. GD&TOP) released this summer made it onto the top 11 on the 'World Digital Songs' chart, and 5 of their summer MVs made it into the 'Most Viewed MVs' chart.

Another noteworthy chart-topper was Psy's "Gangnam Style" as it was the only song that was not released this year, but still managed to rank very high.

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Without further ado, check out the two lists right here!

Top 20 Most-Viewed K-Pop Music Videos on YouTube -- Summer 2015 (in America)