Keeping Shoes On

How do I get my 22 month old to keep her SHOES on in the car? Every time we are in the car she takes them off. It's annoying to have to put them back on every time we get out. I've tried explaining why she needs them on and when I can I carry her instead of letting her walk. (My attempt to show her that she needs her shoes to walk on the ground-She hates it.) But really I can't carry her everywhere, especially with the new baby coming.

Any advice to get her to keep them on?