Kim laments her 'skinny days'

There's nothing like an old photo to stir up a bit of workout inspiration.

Kim Kardashian is using this throwback photo of her pre-baby body to do exactly that, sharing the sexy shot with the world via Instagram.

The pic was taken back in 2010 and shows a svelte Kim flaunting her toned curves in a figure-hugging white Balmain dress. Hello!

Since then, the 33-year-old has had two marriages, one divorce and a lot of air time. Oh, and she gave birth. That might explain the few extra kilos.

After welcoming daughter North in June 2013 with beau Kanye West, the yummy mummy famously shed 23kg of baby weight through diet and exercise.

Looks like her self-motivation techniques are working just fine.

Kim's post-baby makeover