Just 8 months ago, Ashlee Simpson delivered her first son, Bronx Mowgli, alongside hubby Pete Wentz. Mentally, she was prepared for what she thought would be a rigorous whip-me-back-into-shape routine to shed her baby weight.

Turns out it was far more of a cinch than she anticipated:

After I had Bronx I lucked out," the actress-singer told Celebrity Baby Blog. "I mean, I’m 24-years-old, [I have] the genes from my mother and I did work out for three months."

Wish we could give you some story chock-full of magic potion, glitz, and glam but it turns out that Ms. Simpson is just another positive, living role model showing that hard work and listening to your body really do pay off!

Smart lady, that Ashlee!