Let the Beliebers rejoice — tween idol Justin Bieber’s romance with Selena Gomez has reportedly hit a sour note.

Gomez, a Disney star, was furious with her baby-faced beau for bringing rapper Sean Kingston — who was arrested as a child for burglary — to one of her Florida concerts last week, The Sun newspaper reported.

Gomez, 19, laid down the law with the 17-year-old phenom and told him to stop hanging out with his pals, the paper said.

She disapproves of Kingston, and other bad boys like Lil Wayne, who spent a year on Rikers Island for a gun charge, and Chris Brown who smacked around his ex-girlfriend Rihanna.

“Selena told him to stop hanging with these bad people,” one of Gomez’s pals said.

“They had a huge fight and said it was good they were having time apart while she was on tour,” the unidentified friend said.

The young duo went public with their relationship earlier this year. There was no word yesterday from either of the tween dreams’ camps on whether the reports were true.