McDonald’s holiday collaboration with superstar Mariah Carey is launching today, and fans should get ready for 12 days of free food.

First announced in November, the chain’s festive giveaway featuring the singer will kick off on Monday and run through Christmas Eve.

Every day, customers who spend at least $1 on the McDonald’s app will earn a free menu item. In the style of an advent calendar, each day of Mariah’s Menu will unlock a new freebie, starting with a Big Mac on December 13.

Here’s the rest of the schedule:

• December 14: McChicken
• December 15: Bakery Item
• December 16: 6-pc Chicken McNuggets
• December 17: Cheeseburger
• December 18: Hotcakes
• December 19: McDouble
• December 20: Apple Pie
• December 21: Sausage McMuffin with Egg
• December 22: Double Cheeseburger
• December 23: Sausage Biscuit
• December 24: Chocolate Chip Cookies

And that’s not all—as we’ve grown to expect from Mickey D’s celeb collaborations, this one will also include a line of merchandise. But this time, the chain is giving it away for free. On December 15, the first 10,000 fans to redeem the Mariah deal will receive a complimentary beanie, while on December 21, the prize will be a T-shirt.

The beanie is black and includes the singer’s autograph embroidered in gold, while the short-sleeve T-shirt features a throwback image of the singer eating her favorite McDonald’s order in the ’90s.

“Just like so many of my fans, I have such amazing memories with McDonald’s over the years,” Carey said in a statement. “I always get a sense of nostalgia when I see the Golden Arches, so creating throwback merch with one of my favorite photos from the 90s was really fun for me.”

If you want to get your hands on either of these items, prepare to face stiff competition, as the merch will only be available on a first-come, first-served basis.