Grande's tour initiative #ThankUNextGen has broken records for first-time voter registration.

Two fans who registered to vote at one of Grande's tour stops. @headcountorg/Instagram

Grande teamed up with the organization HeadCount to register voters at her concerts, dubbing the initiative #ThankUNextGen.

In July, many months before the end of Grande's tour, CNBC reported that HeadCount had already signed up 17,000 voters — more than any other year before a presidential election.

"Rock the Vote has processed almost 60% more registrations this year than it did by this time in 2015, which holds the record for registrations for a year leading up to a presidential election," President and Executive Director Carolyn DeWitt told CNBC. "I fully suspect we will shatter that record this year."

Although Bernstein declined to clarify how many voters had been registered at Grande's concerts, HeadCount did tell CNBC it's registered twice as many voters during the Sweetener World Tour as any other tour over the last three years. It's the most successful solo artist tour HeadCount has seen since 2008.

Editor's note: A previous version of this article incorrectly stated that all of Grande's tour outfits had been made by Versace. It also included statements by Bennett in which he said Grande was "miserable" on her last tour and didn't like the way the lighting made her forehead look. Representatives for Bennett and Grande told Insider those statements were false.