Selena Gomez justin bieber drinks sunglasses denim boots necklace

The girl's got a sense of humor!

Was Selena Gomez mimicking ex-boyfriend Justin Bieber's favorite beverage, sizzurp, with her pineapple-flavored soda and Styrofoam cup yesterday? ... Only thing missing were the Jolly Ranchers!

Clearly Selena just had a to-go cup from the Valley restaurant where she lunched on Sunday. But we think the coincidence is kinda funny ...