Erase unsightly armpit stains with a mixture of lemon juice and water. For tough armpit stains, try rubbing a paste of baking soda and water on the stain, letting it sit for a few minutes, and then rinsing it off before throwing it in the wash.
Use hairspray to remove a lipstick stain. Spray the fabric (make sure it's not dry-clean only) with hairspray, and let it sit for a few minutes. Dab the stain, and then toss it in the washer. Genius Hacks for Fixing Ruined Clothes]