Audience members of Pink's forthcoming Aussie tour had better be well behaved.

The feisty US pop singer halted her recent hometown gig in Philadelphia to chastise two fighting women who had made a young fan cry.

The Trouble singer was performing an acoustic version of her hit single Who Knew? on Sunday night when she spotted the youngster in tears.

Pink asked: "Is everything OK right here? Why is she crying?"

When a woman nearby explained the little girl was upset by the actions of two battling fans, the singer reprimanded the women for "fighting around a little girl" and then offered the young fan a toy frog and a Rice Krispies Treat bar to cheer her up.

Showing her maternal sensitivities, Pink said: "Rice Krispies Treats make everything better."

She then turned back to the fighting fans before continuing with the show, adding: "Cut it out, you are all growna... women."

Pink will perform 42 concerts in Australia and the tour kicks off in Perth on June 25 with four sold-out shows at Perth Arena.