So the lingerie giant decided to double down on the challenge by creating two Fantasy Bras to be worn by two of its veteran Angels. Check out the big reveal and go exclusively behind the scenes with Alessandra Ambrosio and Adriana Lima, below, to catch a glimpse of the bras before they fly to London for the December show.

Both stars are no strangers to the concept of hitting the runway in a bra that requires its own security, having worn one in 2008 and 2010 (Adriana) and in 2012 (Alessandra). But this year the stakes were raised when the models, both 33, found out they’d be wearing mirror-image sapphire, ruby and diamond sets created by Pascal Mouawad and valued at $2 million apiece. Each lingerie set contains 16,000 perfect gems and is accompanied by 18-karat-gold-strung jeweled body pieces (see the setup, below) — all of which took more than 1,380 hours to create

Both models had fond memories of their first trip down the runway (Ambrosio: “I just had my son Noah and was breastfeeding when I heard I couldn’t stop thinking of how many jewels they will need to make it!” Lima: “When I first put it on, I thought, this is so incredibly beautiful. Then I thought, Wow, my chest is worth a lot of money right now!”) and are excited to don it for the cameras again. “It is every model’s dream to wear Victoria’s Secret Fantasy Bra so when you get chosen it is very important to do it with elegance and enthusiasm,”

Lima’s final thought? “The difference between what you can find in the store and the Fantasy Bra is really only the price tag!” You can judge that for yourself when you watch the show, airing Dec. 9 on CBS