Sleigh Bells, American noise pop musical duo, has reportedly accused Grammy-winner Demi Lovato of allegedly sampling their songs without permission.

Sleigh Bells claimed that Lovato’s “Stars,” a bonus track from the her LP, contains illegal sample tunes from their songs “Riot Rhythm” and “Infinite Guitars.” The two songs were included in the duo’s 2010 album “Treats.”

The duo, consisting of Alexis Krauss and Derek Edward Miller, took to Twitter on Monday, saying “Demi Lovato flattered you guys sampled Infinity Guitars & Riot Rhythm for "Stars" but we were not contacted. Gotta clear those."

A representative of Sleigh Bells confirmed that the duo are planning to take action. “I can confirm that the band feels their music has been sampled without proper clearance and are seeking all available remedies with [Lovato's record label] Island Records,” the rep said.

Producers Carl Falk and Rami, however, have denied the accusations of illegal sampling by Sleigh Bells. The producers told Rolling Stone that there is a misunderstanding, and Lovato has nothing to do to with it. Both the producers have writing credits on the song. “We did not use any samples in Demi Lovato’s song ‘Stars.’ Demi was also not involved with the production. She only wrote top line,” the producers said.

Lovato has yet to comment on the issue.

Earlier this year, the former Disney star was accused of ripping off fellow artists in her album “Confident.” Entertainment Tonight reported in July that Lovato's single “Cool for the Summer” features tunes similar to Katy Perry’s “I Kissed a Girl.”

At the time, the 23-year-old singer commented on the issue via Twitter, saying “Sounds nothing like it and with all the advances we've made in the LGBT community..."

Lovato’s latest LP, “Confident,” which released in October, includes “Cool for the Summer” and “Stars."

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