It’s that time of year again. Freeform has kicked off its 25 Days of Christmas programming event with some help from Pretty Little Liars and The Fosters cast members, among others.

Throughout the 25-day event, Freeform will surprise viewers with unexpected gifts and appearances with their Pop Up Santa initiative, along with Miss Piggy, the first Freeform Ambassador of Holiday Cheer.

A few highlights: Pretty Little Liars star Janel Parrish is partnering with Tori Kelly, a star of Illumination Entertainment’s upcoming feature Sing, to surprise a lucky aspiring singer-songwriter with some help to boost his/her music career. It will air Friday, December 2, during The Santa Clause (7:15-9:20 p.m. ET).

The Fosters star Cierra Ramirez and eBay partner to surprise a deserving foster family with a home makeover and more. That will air Sunday, December 4, during National Lampoon’s Christmas Vacation (8:45-10:55 p.m. ET).

Throughout the holiday frame there also will be appearances by Baby Daddy stars Tahi Mowry, Derek Theler, Chelsea Kane and Melissa Peterman, who will team up with various partners for holiday surprises. Funny or Die Presents Santa’s Shorts, which run two to four minutes, also will air throughout event.

All of the above and more can be accessed on the Freeform app and on 25DaysofChristmasTV.com.