Note:
(a) To a Michael Jackson medley, Katelyn Ōhashi competed at the Collegiate Challenge in Anaheim on Jan 12, 2019 (Saturday). She received a perfect-10 floor routine. This is what the above video is about.
(b) Katelyn Ōhashi (born on born April 12, 1997 in Seattle (age 21) to Richard and Diana Ohashi; the Japanese surname is 大橋)
With (naturally) straight hair (like both of her parents), she is of Japanese and German heritage. Height: four foot ten inches. (You can also say four feet ten inches. The former is more colloquial, more in daily use.)