Not afraid to show a little skin, a mid-driff bearing Katherine Heigl was spotted heading to the gym in Los Angeles, California this afternoon (May 11).

The "Knocked Up" star strutted in black yoga pants and an unzipped grey jacket that revealed her flat stomach and bright yellow sports bra.

Earlier this week Katherine hit up a local craft store with her mom where she bought a bunch of fabric and a sewing machine.

Check out the pictures of the 33-year-old shopping with her mom and loading up their purchases in their vehicle.