Throwback items can often make for fantastic holiday gifts: there’s nothing like a re-issued Polaroid camera or vintage board game to evoke a feeling of ecstatic nostalgia in any gift-getter. But day of the week underwear? Now that’s just borderline creepy.

Despite the fact that few people over the age of seven wear day of the week anything, various retailers—including Stella McCartney—have seemingly jumped on the Day-Of-The-Week Undies trend. See for yourself (and give at your own risk) after the jump:

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Wedding season is upon us, and with all of those strapless dresses, one-shoulder and criss-cross back dresses, well, you need a strapless bra that’s convertible. And this one can be worn 5 different ways. It’s not exactly as fun to shop for a strapless bra as it is for an awesome pair of shoes, or a cool dress, so we’ve made it easy. The best strapless bra out there is….Spanx’s Bra Cha Cha strapless bra ($68). Want to know why? Watch the video after the jump. You can thank us later!

Check out more shapewear, and our favorite party dresses, nude shoes and jewelry.

Enter below to win $250 worth of Yummie Tummie shapewear.

Shapewear is not only supposed to make you look slimmer, but it should also make you feel more beautiful… not like a human sausage. That nuance is what makes Yummie Tummie one of the best selling brands out there; not only will it make you look great, but you’ll still be able to breathe and go about your daily life like a human being. Think Wow, not Ow!

The cherry on this diet sundae, however, is Yummie Tummie’s selection of underwear as outerwear. The brand new ready-to-wear collection features pieces like the Chiffon Tier Top ($96) that are sexy and shaping at once.

These editor’s favorites (and many more) can now be yours without thinning out your wallet. To win the $250 shopping spree, just sign up to our newsletter and comment below about which Yummie Tummie piece you’d choose for yourself.

Want it now? Visit Yummie Tummie to shop the latest collection.

Rules:
1. You must be a subscriber to our newsletter to be eligible. Sign up here if you haven’t already done so.
2. To enter, all you have to do is comment below about which is your favorite Yummie Tummie product.
3. You must supply us with a valid email address.
4. The contest starts now and entries must be date stamped by our server no later than Friday, April 8, 2011 at 11:59 AM Eastern Time to be eligible.
5. One winner will be selected during a random drawing and will be notified via e-mail and must respond as instructed to receive the prize.
6. No prize substitutions.
7. You must be 18 years old or older and a resident of the US to enter. Entries from the state of Florida are void.
8. No purchase necessary.
9. Void where prohibited.
10. Click here to see the full rules.

What do you get when you mix blow-up underwear and a camelbak style bra? An inflatable, airbag bra, obviously.

The product will launch tomorrow, ahem, on April Fool’s Day–so we’re slightly suspicious. Before inflation, it’s actually a fairly normal-looking bra (photo below), padded with a deflated air bag, which is triggered to inflate upon, um, forceful contact.  Hugs just got a whole lot more interesting.

“Sick of going head over heels? Ever had a few too many cocktails and tripped up on the way home? We have, and it really gets us down!” Yes. That is really a direct quote from the press release.

In the mood for something a little more mainstream? Check out our buying guides on the best push up bras, t-shirt bras, and sexy shapewear.

Test your fashion IQ with all of our Taste Tests. Shop our guides to the best bras and the best cheap bras. Join our e-mail list for exclusive SHEFinds updates.

Press your fashion luck with all of our Taste Tests. Shop our guides to the best sexy underwear and the best cheap underwear. Subscribe to our e-mail list for exclusive updates.

One lucky SheFinds reader will win this Blush lingerie set, worth $60.

Satin ties and delicate scalloped lace trim are both romantic and sexy.

To enter to win, visit Bare Necessities and comment on what you’d like to wear most this Valentine’s Day; then sign up for our newsletter. That’s it!

Can’t wait? Visit Bare Necessities where you can order the Blush Love Game Bra and bikini set today.

Rules:
1. You must be a subscriber to our newsletter to be eligible. Sign up here if you haven’t already done so.
2. To enter, comment below about what you you’d like to wear this Valentine’s Day from Bare Necessities.
3. You must supply us with a valid email address.
4. The contest starts now and entries must be date stamped by our server no later than Friday, February 11, 2011 at 11:59 AM Eastern Time to be eligible.
5. One winner will be selected during a random drawing and will be notified via e-mail and must respond as instructed to receive the prize.
6. No prize substitutions.
7. You must be 18 years old or older and a resident of the US to enter. Entries from the state of Florida are void.
8. No purchase necessary.
9. Void where prohibited.
10. Click here to see the full rules.

These Hanky Panky Ariel Lace Hipster ($28.70, down from $41) are a great sexy black go-to. If you’re an animal print kind of girl, these Hanky Panky Shocking Leopard Boy Shorts ($25.20, down from $36) are hot (especially if your man has a boy shorts fetish).

Act fast – because there is only 1 of these Hanky Panky Feather Lace Bikini Briefs ($28, down from $40) left. If you need an excellent thong, go for this Hanky Panky Zebra Whisper Thong ($16.80, down from $24). It will be a “crowd pleaser” – trust us.

More sales going on right now:

30% off Kara Ross, Kenneth Jay Lane, More

50% off Foley + Corinna

Last day to shop Urban Outfitter’s HUGE sale

50% off tons of great stuff at Apart Style

65% off at Piperlime

70% off luxe bras and underwear at The Outnet

Follow the author of this post on Twitter @shefindseileen.

Check out more sales and deals, best find of the day favorites, and our calendar of online sample sales so you never miss out.

More awesome sales:

Neiman Marcus’s Final Call sale (code WINTER)

Cozy, On-Sale Sweaters at Saks

50% off shoes at Piperlime

Vena Cava at Bloomingdale’s

30% Off Madewell

Check out our guides to sexy bras, sexy underwear, and cheap underwear while you’re at it. Then don’t forget to peruse our hand-picked sales and deals and best find of the day favorites.

Follow the author of this post on Twitter @shefindseileen.

Start the new year off right…by updating your underwear drawer. At Gap, you can do it without emptying your wallet, where underwear starts at $4.99. This cotton thong (also available in two other colors) is just $4.99, down from $8.50. So get to it — if you’ve got a Gap gift card, this is the time to use it.

Check out more of the best sales and deals, plus all of our favorite best find of the day picks, and peruse our calendar of online sample sales.