Justin Timberlake and Jessica Biel posted Instagram photos and videos of the cheeky Elf on the Shelf displays set up for their sons Phineas and Silas in honor of Christmas.

ELLSWORTH, Maine (WABI) -Christmas elves have become a tradition for a ... this mom and son will get to keep forever thanks to these two pranksters and the kindness of Sgt. Mote for letting ...