Beyoncé wishes her twins Rumi and Sir a happy 8th birthday with the help of her fans at her fourth Cowboy Carter show in London Thursday night.

Z’s youngest kids Rumi Carter and Sir Carter the spotlight during her Cowboy Carter tour stop in London June 12. See how the crowd marked her twins’ birthday.

Midway through the performance, the pop superstar quickly paused to wish her twins, Rumi — who joined her mother on stage — and Sir, a happy birthday. “Everybody say happy birthday, Rumi,” Bey told the obliging crowd, while 13-year-old Blue Ivy lovingly cupped her little sister’s chin.