On 15 July 2012, Jenneke finished fifth in the 2012 IAAF World Junior Championships 100 m hurdles. After the competition, a video of her 100 m hurdles taken during the heats race, was subsequently posted on a video-sharing site, raising her profile around the world.
In July 2012 videos of Jenneke dancing during her pre-race warmup before the 100 m hurdles race at the 2012 World Junior Championships in Athletics in Barcelona went viral on YouTube. One clip received 19 million views by the following week and was featured on the American late-night talk show, The Tonight Show.