While fellow partygoers like Beyonce and Jay Z enjoyed beers, pizza, and sushi and mingled with pals like Justin Timberlake, Gomez, who has dated Bieber on and off for three years now, was reportedly getting emotional over the "Boyfriend" singer.
She shouted, 'No one understands me! My boyfriend doesn't even understand me," an insider tells Us, adding that bystanders — including guest Sam Smith — "just stared [at her]."
Aside from the dramatic scene, which took place on the upper terrace, the rest of the party was having a "total blast," another source tells Us.
http://www.usmagazine.com/celebrity-...party-20141712