The 23-year-old mommy-to-be bought six pairs of size 0 jeans, as a source of motivation to lose the weight after she delivers her baby.
"Ashlee broke down in tears at a doctor’s appointment in early August when she found out she’s gained more weight than is considered in the healthy range," a source told the National Enquirer tabloid.
The rocker wants to get back to her pre-pregnancy figure by buying the most skin-tight clothing, with the goal of being able to slip them on as soon as possible, following her baby’s birth.
In the meantime, Ashlee Simpson is promoting her own line of clothing distributed by Zellers, and is also working on her baby’s nursery.