This is the ultimate SI Swimsuit giveaway you don't want to miss!

It looks like Santa Claus is coming a little early this year, and he's bringing with him the ultimate SI Swimsuit giveaway! For the first-time ever, we're giving away not one, not two, but 10 signed, limited edition copies of the 2014 SI Swimsuit issue.
So how do you win? It's simple! Follow us on Snapchat (siswim or scan the code picture below) and watch our story to find a secret question we need your help answering. Then tweet at @SI_Swimsuit with the answer. We'll give an issue away to the 10th, 50th, 75th, 100th, 150th, 200th, 300th, 400th, 500th and 750th person.
Keep in mind that a Snapchat story only lasts for 24 hours, so you'll need to find the question and send in your response before 11:59pm EST tomorrow to be eligible to win. Winners will be notified via DM when the contest is complete.
GOOD LUCK!
See some of Nina, Lily & Chrissy's best moments!

James Macari/SI
Nina Agdal was photographed by James Macari in the Cook Islands. Swimsuit by San Lorenzo.

James Macari/SI
Lily Aldridge was photographed by James Macari in the Cook Islands. Shorts by Letarte by Lisa Cabrinha.

James Macari/SI
Chrissy Teigen was photographed by James Macari in the Cook Islands. Swimsuit by Toxic Sadie Swimwear.

James Macari/SI
Nina Agdal, Lily Aldridge and Chrissy Teigen were photographed by James Macari in the Cook Islands. Swimsuits by San Lorenzo and Luli Fama.

James Macari/SI
Nina Agdal was photographed by James Macari in the Cook Islands. Swimsuit by Cosabella.

James Macari/SI
Lily Aldridge was photographed by James Macari in the Cook Islands. Swimsuit by Maui Girl by Debbie Wilson.

James Macari/SI
Chrissy Teigen was photographed by James Macari in the Cook Islands. Swimsuit by Eberjey.

James Macari/SI
Nina Agdal, Lily Aldridge, and Chrissy Teigen were photographed by James Macari in the Cook Islands. Swimsuits by Beach Bunny Swimwear, Basta Surf and Bettinis.

James Macari/SI
Nina Agdal was photographed by James Macari in the Cook Islands. Swimsuit by Maui Girl by Debbie Wilson.

James Macari/SI
Lily Aldridge was photographed by James Macari in the Cook Islands. Swimsuit by San Lorenzo.

James Macari/SI
Chrissy Teigen was photographed by James Macari in the Cook Islands. Swimsuit by Kovey.

James Macari/SI
Chrissy Teigen, Lily Aldridge and Nina Agdal were photographed by James Macari in the Cook Islands. Swimsuits by Ola Vida, H&M and Luli Fama.

James Macari/SI
Nina Agdal was photographed by James Macari in the Cook Islands. Swimsuit by Kate Swim.

James Macari/SI
Lily Aldridge was photographed by James Macari in the Cook Islands. Swimsuit by MIKOH.

James Macari/SI
Chrissy Teigen was photographed by James Macari in the Cook Islands. Swimsuit by Luli Fama.