Jutsin Bieber

Justin Bieber performs on the stage in concert at MasterCard Center on September 29, 2013 in Beijing, China

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Justin Bieber's Music Mondays release series has been a pretty downcast affair, and while eighth entry "Roller Coaster" still extols being "lonely overseas" and "lonely memories," the follow-up to the R. Kelly collaboration "PYD" is the series' most buoyant, danceable track yet.

"For a minute we were up, but the next we were falling down," Bieber laments over chopped-up strings and wonky guitar licks. "Roller Coaster," like the rest of the Music Mondays tracks, touches upon Bieber's high-profile break-up with Selena Gomez, but Bieber's sorrow is refracted through a disco ball that recalls another, more senior Justin -- Timberlake.

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On last week's Hot 100 chart, "All Bad," the sixth entry in the Music Mondays series, started at No. 50 on the Hot 100; the first five tracks in the 10-week series -- "Heartbreaker," "All That Matters," "Hold Tight," "Recovery" and "Bad Day," have sold a combined 756,000 downloads, according to Nielsen SoundScan. Just two songs remain in the series, which leads up to the Dec. 25 release of Bieber's "Believe" movie.

"All my friends at AMA's have fun," Bieber posted to Twitter on Sunday night (Nov. 24). The Biebs was not in attendance at the 2013 American Music Awards -- he's currently on tour in Australia.