Kylie Jenner and daughter Stormi were all about Travis Scott's amazing concert Saturday night in London ... they were jammin' just like the normies in the packed stadium.
Kylie and their kid were arms up as Travis performed to a sold-out crowd at The O2 Arena ... which held 20,000 screaming fans.
This was Travis' first arena concert since the Astroworld tragedy last year, and it went off without a hitch .