Lisa Kristina Ajax (born 13 August 1998 in Järfälla, Sweden), is a Swedish singer, and winner of Idol 2014.

On 28 November 2014, she made it to the Idol finals inside the Stockholm Globe Arena. Her recording of the song "Love Run Free" reached the 48th position at Itunes during its first week at chart. On 5 December 2014, she won the Idol finals ahead of runner-up Mollie Lindén.

She also participated at Lilla Melodifestivalen 2012 with the song "Allt som jag har". Ajax participated in Melodifestivalen 2016 with the song "My Heart Wants Me Dead", and qualified to the finals at Friends Arena. She placed seventh in the final.