The girl group also returns to the Top 10 of World Albums with 'The ReVe Festival: Day 2.'

Red Velvet dropped a late-summer pop anthem and it's led to another chart milestone.

The girl group's latest single "Umpah Umpah" debuts at No. 9 on Bllboard's World Digital Song Sales chart this week, marking the group's 15th song to hit the Top 10. Red Velvet first appeared on World Digital Songs just over five years ago when their debut single "Happiness" entered at No. 4 in August 2014. The outfit has since scored 14 more Top 10s, nine of which have gone into the Top 5 of the chart including their sole No. 1 with "RBB (Really Bad Boy)."

In fact, every single one of Red Velvet's promoted Korean singles has scored inside the Top 10, making them a consistent star on the chart. Among all of Red Velvet's songs, "Bad Boy" remains their best seller in America with 26,000 downloads sold to date, according to Nielsen Music. Among all K-pop girl groups, only 2NE1 has scored more Top 10 singles with 16 hits in the Top 10 on World Digital Songs to date.

Over on the albums charts, Red Velvet's newly released The ReVe Festival: Day 2 EP debuts at No. 6 on World Albums, selling 1,000 copies in the week ending Aug. 22 according to Nielsen Music. Just like their singles, all of Red Velvet's 12 Korean albums or EPs have made the Top 10 of the chart too since first entering with 2015's Ice Cream Cake EP. The group's latest EP also bows at No. 11 on the Heatseekers Albums, their eleventh appearance on the chart that sees fewer K-pop acts able to enter.

Among all of Red Velvet's projects, the troupe's top-selling album in America is their RBB – The 5th Mini Album EP which has sold 10,000 copies in the U.S.

While Red Velvet has become increasingly experimental with their latest releases (felt in last year's horror-pop vibe of "RBB" and the schizo-genre mash-up "Zimzalabim" from earlier this summer), the Day 2 EP is a safe place of feel-good pop that emphasize the band's knack for harmonies. "Umpah Umpah" keeps the upbeat, breezy vibe from 2017's "Red Flavor" -- one of the group's best-ever songs -- but allow members Wendy, Joy and Seulgi to show off a bit more vocal power on the chorus in between lyrics are filled with references of past RV tracks sure to delight longtime fans. Other Day 2 tracks like the '60s brassy-soul vibe of "Ladies Night, the shoo-wop style of "Love Is the Way" plus tender album closer "Eyes Locked, Hands Locked," which sees the ladies veering into neo-soul territory, all show off the band's harmonious strengths.

Watch Red Velvet's latest music video below, "Umpah Umpah" with 20 million views at press time, plus one of the first performances of the song on Korean music-chart program KBS Music Bank below: