The 20-year-old will re-join the judging panel next to Cowell in the fall

It’s going to be Simon vs. Demi round two when The X Factor returns this fall.

Lovato is returning as a judge for season 3 of the Fox reality competition, the network announced on Thursday.

“I am so excited to return as a judge and mentor on The X Factor,” the 20-year-old singer said in a statement. “Last season was an unbelievable experience and I really enjoyed developing personal relationships with the contestants and the panel. I look forward to taking my previous experience and applying it to make this season even better!”

Lovato, who was joined on last year’s judging panel by Cowell, L.A. Reid and Britney Spears, famously clashed with the tough Brit during the show, swapping biting commentary as Cowell sometimes questioned Lovato’s mentoring abilities.

Nevertheless, Cowell, a producer on the show, is ready for her return.

“I couldn’t be happier that Demi wants to come back this year,” Cowell said in a statement. “She’s a superstar in her own right and was a fantastic mentor last year. Even though she can be really, really annoying – I truly enjoyed working with her and so did the artists.”

In January, a source close to Spears told PEOPLE she was leaving the judging panel after appearing on only one season. Her replacement has yet to be announced.

Meanwhile, open auditions for The X Factor continue in New Orleans on April 14.