India, April 29 -- Beyonce kicked off her highly anticipated Cowboy Carter Tour in Los Angeles Monday night. She was joined onstage by her two daughters, Blue Ivy, 13, and Rumi, 7, at the SoFi Stadium. The adorable moment has since gone viral, with videos of the Carter family's performance making rounds on the internet.

While Blue has performed alongside her mother several times, Monday's opening show marked her younger sister's onstage debut. Beyonce's fans erupted into cheers as the teenager surprised them with her energetic number to America Has a Problem.

As she took the stage, Beyonce's backup dancers stood behind, giving Blue her moment to shine. The Texas Hold 'Em singer beamed with pride, watching her eldest on the front. Meanwh...