Celebrity Celebrity Moms See Hilary Duff’s Adorable Photo of Her “Little Boo Thang” By Olivia Bahou Olivia Bahou Facebook Olivia Solomon is a New York-based writer and editor who covers all things fashion, lifestyle, celebrity, and pop culture. She was previously the Assistant Digital Editor for InStyle, and her work has appeared in many national publications. InStyle's editorial guidelines Updated on March 9, 2016 @ 05:45PM Pin Share Tweet Email Photo: Neilson Barnard/Getty Images Hilary Duff finalized her divorce with husband Mike Comrie last month, and she just took to Instagram to show off her “little boo thang.” But the Sparks singer’s latest squeeze isn’t a new man—it’s her adorable niece! The Younger star posted an adorable photo of her famous sister Haylie’s 10-month-old daughter, Ryan Ava Erhard Rosenberg. In the photo, Duff and Ryan are laying side by side in a cozy bed. The singer has her hand on the infant’s chest, and little Ryan is squeezing her aunt’s palm. “With my little boo thang bitty booty Ryan Ava,” she wrote in the caption. “@haylieduff @mattyrose3 y’all made a cute one.” Hilary Duff Introduces New French Bulldog Puppy, Peaches: "I Have a Chunky Little Butt" With her own adorable 3-year-old son Luca and a new French bulldog puppy, it looks like the star is loving her downtime at home.