Demi Lovato faced a security scare on Thursday after a horde of hysterical fans stormed the stage at her concert in Paraguay.

The pop star caused pandemonium at her sold-out gig in the capital city of Asuncion when she invited the front row into the empty pit in front of the stage.

She said, "I feel like I'm not doing you guys justice tonight because I have to admit I'm not feeling too good. I'm really sorry. I feel like I could be doing something more for you guys... so I wanna let all these kids (into the pen) down here. You guys gotta be safe though!"

Hordes of fans then leaped over a security barrier to get closer to the star, and several youngsters even climbed onstage to hug a startled Lovato, who was promptly whisked away by burly security guards.

The singer eventually emerged from backstage a minute later and told the crowd, "You gotta chill out."

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