Beyonce's daughter, Rumi, made a rare appearance at the launch of her Cowboy Carter tour - while her twin brother Sir is usually kept out of the spotlight due to his quiet personality

Beyonce's fans were sent into a frenzy when her daughters Blue Ivy and Rumi joined her on stage for her Cowboy Carter tour, but the star's son, Sir, was nowhere to be seen

"Rumi — who's on the album, my youngest daughter — she was watching," Beyoncé told the show. "I forgot to thank her so I get to thank her now. Thank you, Rumi." Beyoncé's Co