The birthday celebrations continue for Gigi Hadid. The model, who rang in her 20th year on April 23, was joined by Kendall Jenner for a fun-filled belated bash in N.Y.C. on Sunday, and the duo documented the night with an adorable Instagram (above). But they weren't the only ones sharing their fun this weekend—Blake Lively posted some behind-the-scenes snaps from her Age of Adaline press tour, while Sam Smith showed his love to fans with a new tattoo dedicated them. See these and more of our favorite Instagrams from the weekend below.