The duo openly called out the pop diva on Twitter as they pointed out that their "Infinity Guitars" and "Riot Rhythm" might have been illegally sampled on her "Confident" track called "Stars", reported Ace Showbiz.
"Demi Lovato flattered you guys sampled Infinity Guitars & Riot Rhythm for 'Stars' but we were not contacted. Gotta clear those (sic)," the New York-based group wrote.
While Lovato hasn't responded to the tweet, some of her fans have and they're clearly not having it.
The fans claim the group just wants some attention.
"Stars" was co-penned by Savan Kotecha as bonus track off Lovato's latest album, which debuted and peaked at No. 2 on Billboard 200.
"Infinity Guitars" and "Riot Rhythm", meanwhile, are both featured on Sleigh Bells' 2010 set "Treats".