Kim Kardashian‘s nine-year-old daughter North West was brought on stage by Katy Perry during the pop star’s Las Vegas residency PLAY at Resorts World on Saturday night.

An eyewitness told DailyMail.com that Katy, 38, hosted a ‘walk off competition’ for her Firework Foundation and ‘invited North West onto the stage’ to participate.

‘While on the stage North asked if her friends could join her and Katy obliged,’ they revealed.

Proud mom Kim, 42, was quickly escorted to the front row to watch North and her pals dance with the Teenage Dream hitmaker, as shown in photos obtained by DailyMail.com.

‘People cheered when they saw Kim supporting North with the crowd going wild,’ a concertgoer revealed.

Also rooting for the young ladies were Paris Hilton and Sia, who ‘spent the evening singing and dancing along to every song.’

Epic! Kim Kardashian’s nine-year-old daughter North West was brought on stage by Katy Perry during the pop star’s Las Vegas residency PLAY at Resorts World on Saturday night

Come on up! An eyewitness told DailyMail.com that Katy, 38, hosted a ‘walk off competition’ for her Firework Foundation and ‘invited North West onto the stage’ to participate

Scream!:  North screamed with delight when she heard the singer invite her to the stage

Proud mom Kim, 42, was quickly escorted to the front row to watch North and her pals dance with the Teenage Dream hitmaker, as shown in photos obtained by DailyMail.com