Passionate about drawing, her work is serious, wide - ranging, and also often humorous. She is playful in her depictions of her subject matter (a spontaneous chuckle is often the first response of the viewer) and playful too in her continous use of different techniques.
Her Natural World images are a celebration of all living creatures, manifesting again the delight in different materials. Bieber has the rare ability of being able to describe the timeless characteristics of human situations.
The "Heads" series shows her fascination both with the human form and character. The faces are never just formally posed but have an understanding of the inner person. It is in fact this empathy which informs and fuels all her artwork.