Ashlee & Pete Get Ready for Baby

Almost five months after confirming they're expecting, it looks like Ashlee Simpson and hubby Pete Wentz are doing some last minute preparations for their baby's nursery!

The 24-year-old musician and mother-to-be stopped in with her mom at art gallery and children's bookstore Every Picture Tells a Story in Santa Monica, Calif. on Saturday and bought a print from The Nightmare Before Christmas.

"Ashlee looked radiant and heavily pregnant," says an eyewitness. "She had bright red hair and looked striking. She was very sweet and had a genuine interest in the children's art on display."

After picking up the slightly creepy artwork, Ashlee continued on to Jenny Bec's toy store to shop for more baby goodies.

The Nightmare Before Christmas print Ashlee & Pete purchased

"We're getting the nursery ready," Ashlee said recently. "I can't wait to be a mom and he can't wait to be a dad, so it's fun."