Red Velvet is the top Kpop girl group for September, based on the brand reputation rankings released by Korea Institute of Corporate Reputation which analyzes data to determine celebrities' brand value.

Red Velvet was trailed by BLACKPINK and TWICE based on 115,865,868 pieces of data analyzed from August 6 to September 7.

According to a report by Soompi, Red Velvet, composed of members Irene, Seulgi, Wendy, Joy, and Yeri topped the list with a brand reputation index of 9,207,195. This indicates a 40.52 percent increase from their August performance. Red Velvet's top key phrases for the month include "transform," "happy," and "hot," love," and "prepare."

Red Velvet posted the highest-ranking term for Joy and Umpah Umpah, and Irene. These key terms played a key role to girls' skyrocketing index for the month. It can be recalled that SM Entertainment released the second installment of their three-part comeback for the year entitled, The ReVe Festival Day 2 with its title track Umpah Umpah. Joy was also tapped as one of the hosts of lifestyle show, Get It Beauty.

BLACKPINK maintained its second-place rank with a brand reputation index of 7,704,653 and TWICE closely trailed the YG artists with a score of 7,677,218 for September. Rounding up the top 10 are Oh My GirlMAMAMOOITZYGirls' GenerationIZ*ONELovelyz, and GWSN.

Red Velvet's strong performance has been consistent for their second comeback of the year with fans responding positively to their dance hit Umpah Umpah. Billboard recently reported that the track marks Irene, Seulgi, Wendy, Joy and Yeri's 15th Top 10 entry to the World Digital Song Sales Chart.

Umpah Umpah ranked 9th in the recent week's World Digital Song Sales Chart. In its report, Billboard credited the group for its consistent Top 10 song in the chart, keeping them on track to overtake the record of 2NE1 with sixteen Top 10 tracks in the list.

Billboard credited Red Velvet for getting into the Top 10 for all of their promoted tracks since their first release of Happiness in 2014, peaking with Really Bad Boy which charted at No. 1.

Like its ranking in the World Digital Song Sales Chart, Red Velvet also performed well in the World Albums Chart with The ReVe Festival Day 2 EP debuting at No. 6 on the World Albums and selling 1,000 copies on its first week out, Nielsen Music indicated.