Much discussion has been given to the nature of her breasts, with a blog presenting its evidence that she has breast implants. A website that hosts her pictures responded to these accusations with testimony from a Los Angeles plastic surgeon and radiologist that her breasts are natural. The video contained not only testimony but a live, unedited sonogram exam of her breast tissue, which showed that no implants existed and that her breasts are entirely natural.
Defi has achieved mainstream popularity in the United Kingdom, appearing with top UK glamour model Michelle Marsh on the front cover of the lads' mag Loaded in January 2007. She appeared on the cover again in the March 2007 issue and featured in the magazine's free 3D DVD, photographed with Lucy Pinder. She was featured as the magazine's top centerfold model in the May and June 2007 issue.
In 2006, she appeared as a guest on the German talk show Die Oliver Geissen Show.
Her official website, Janaglam.com launched in January 2008.
Defi speaks seven different languages including Czech, English, German and Polish.