In the sweet snapshot -- which the "Come & Get It" singer, 21, simply captioned "Sissy" -- Gomez is cuddling her 9-month-old baby sister while lying on the ground outdoors. The two buds are smiling ear-to-ear as Gracie rests on Gomez's stomach.
Gomez's mom, Mandy Teefey, and her husband Brian Teefey welcomed the new addition to the family back in June 2013. Two weeks after her arrival, the couple debuted Gracie for the first time during a park outing. (Mandy divorced Gomez's father, Ricardo Gomez, when the star was 5-years-old. She and Teefey tied the knot in 2006.)
"I definitely didn't appreciate [my upbringing] when I was little," Gomez admitted in the November 2013 issue of Glamour. "I was frustrated that my parents weren't together and never saw the light at the end of the tunnel where my mom was working hard to provide a better life for me."
She added: "It's because of [my mom] that I can do things on my own."