After applying to an open casting call in Munich Ailabouni managed to reach the top 18 and started to dominate the competition by winning several castings. However, due to her shy personality, the judges questioned her limelight ability and saw her struggling several times when she was required to perform out of her comfort zone. For a long time she was the only non-German top 3 finalist of Germany’s Next Topmodel (although former winner Sara Nuru was of Ethiopian heritage she owns the German citizenship), until cycle 10, where Ajsa Selimovic, who lives in Austria, managed to reach the top 3. In the final Alisar managed to win beating fellow-contestants Hanna Bohnekamp and Laura Weyel on a live final held in June 2010. She then appeared on the cover of the German Cosmopolitan in July 2010 and in a commercial for Venus Breeze, a job she won on the show.

She walked for G-Star SS2011-collection in New York and walked the Berlin Fashion Week the following season. She has also appeared in an editorial for Vogue Italia’s December 2012 issue. She also walked for 17 different labels at New York fashion week in 2012.

In 2014, Ailabouni was the winning model in Project Runway (season 13). She won after Sean Kelly, the designer she modeled for, won the season.