Ostrenga achieved early Internet fame by posting make-up tutorials on YouTube in 2011, which went viral in Asia and earned her the nickname "real-life Barbie doll."

After gaining attention in Japan, Ostrenga modeled exclusively for the magazine Popteen and also appeared on runways, commercials, and variety shows.

[6] Ostrenga joined YouTube in 2011 under the username "dakotakoti" and began posting make-up and styling tutorials, most of which were unvoiced and gave instructions through subtitles.

[10] Ostrenga's make-up tutorials were profiled in Japanese talk and variety shows Gyōretsu no Dekiru Hōritsu Sōdanjo, Pon!

[8][1] On August 24, 2012, Ostrenga appeared at a launch event of a mascara product at Etude House in Cheongdam-dong, South Korea, and participated in its demonstration showcase.

[9][12] Ostrenga also modeled for Baby, The Stars Shine Bright and Alice and the Pirates at a promotional event for the online RPG The Tower of Princess.