Jan Hellriegel was born in West Auckland to a family of six. While it is true that she worked at her father's panelbeaters (A.F. Hellriegel Panelbeaters Ltd) it was, contrary to popular legend, in the office and not pumping iron. Nonetheless, she has always been the New Zealand media's 'Westie' darling.
Jan moved to Dunedin to attend Otago University, where she graduated with a Bachelor of Arts, and met up with the friends who would later become Cassandra's Ears. Jan also took vocal training in Speech and Singing at Sister Mary Leo.
All Grown Up debuted in the Official New Zealand Top 40 Albums on 26 October 2009. It has been in the Top 40 Albums for one week with a highest position of #38. There are three albums by Jan Hellriegel in the Top 40 Albums.