From left: V, Suga, Jin, Jungkook, RM, Jimin and J-Hope of BTS photographed Jan. 19 at Korea House in Seoul. Styling by Lee Ha Jung. V, Suga and J-Hope wear Saint Laurent tops and jackets. Jin wears a COS top and Saint Laurent jacket and shoes. Jungkook wears a COS top, Saint Laurent jacket and Prada shoes. RM wears a Saint Laurent jacket and shoes. Jimin wears a Saint Laurent top, jacket and shoes.

The K-pop boy band extend their lead as the artist with the most No. 1s on the chart.

BTS' unprecedented success with their new Japanese album Face Yourself extends to Billboard's World Digital Song Sales chart where the K-pop group's new song "Don't Leave Me" debuts at No. 1.

The emotional, electro-pop track sold 9,000 downloads in the week ending April 5, according to Nielsen Music. Those numbers are enough to make this BTS' fifth-biggest debut week for a song and sixth-biggest week overall. Notably, one of those six weeks is the week that the remix of "Mic Drop" with Steve Aoki and Desiigner impacted the charts, which is not considered a debut week since the original and remix versions are combined.

All four of the previously unheard songs on Face Yourself bow on this week's World Digital Songs chart as "Don't Leave Me" is followed by "Let Go" (at No. 2), the "Intro : Ringwanderung" (No. 4), and the "Outro: Crack" (No. 5). "Crystal Snow," the Japanese song that was released in late December last year and is also on Face Yourself, has peaked at No. 2 to date. Altogether, BTS command 12 of the 25 spots of this week's chart.

BTS now extend their lead as the artist with the most No. 1s on World Digital Song Sales to seven. Their closest competitors are in PSY and BIGBANG, both boasting four chart-toppers with the latter boy band scoring their latest No. 1 earlier this year.

The new chart success is a more than appropriate time to reexamine BTS' songs sales in America. To date, the band's best-selling song is their Top 40 breakthrough hit "Mic Drop" with 132,000 downloads sold in the U.S. to date. It's followed by 2015 single "Dope" (with 82,000 downloads sold), 2015's "I Need U" (also about 82,000), 2016's "Fire" (78,000) and 2016's "Save Me" (72,000).

Listen to the recently unveiled Japanese version of "Mic Drop" below via its official video: