Nick Jonas Hangs With His Niece, Miley Cyrus & Fam Rock Ugly Sweaters, Plus More Celeb Christmas Celebrations!

It's a very merry Christmas in Hollywood!

Celebs are enjoying some downtime this holiday season, spending time with loved ones and rocking festive outfits to bring tons of festive cheer.

Nick Jonas bonded with his 1-year-old niece, Valentina, sharing a black-and-white shot with his little buddy to Twitter on Christmas.

"My everything.

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," he captioned the pic with his brother Kevin's youngest daughter (he's also dad to 3-year-old Alena). "I hope you’re all having an amazing Christmas."

Nick's ex, Miley Cyrus, spent Christmas Eve with her family. She and big sis Brandi Cyrus rocked matching ugly sweaters, and The Voice coach also snagged selfies with her brother, Trace, her grandmother and one of her many pups.

Miley Cyrus christmas celebrations
Miley Cyrus/Instagram

The entire Cyrus crew, including dad Billy Ray and mom Tish, also posed for a family pic.