OK, so beauty products like these can be great, easy gifts. But that doesn't mean everything in Sephora is fair game. A few things you should never buy for someone else:

1. Blatant anti-aging products. Anti-wrinkle serums just say: "You look old."

2. Acne-fighting products. Same deal. Now you've made her paranoid that everyone's staring at the zit on her forehead -- nice.

3. Elaborate skin care kits for a non-metrosexual man. He'll never use it, end of story.

4. Super-fragranced products. You may love musk, your aunt thinks it smells like a sweaty lumberjack. Stick with lightly fragranced products instead.

5. Nose-hair trimmers or anything hair removal-related. "Hey, Merry Christmas! Here's a nose-hair trimmer/waxing kit/epilator! It's painful and embarrassing but I think you're super-hairy so I gave it to you anyway."

• Check out these great -- and cheap -- beauty gifts instead.

• Look great during the holidays -- even if you did buy mean-spirited gifts.

• Cheap out and get some beauty product samples here.