M5 performed a concert at the Mandalay Bay Events Center to celebrate the new year and then the guys arrived at the party shortly after 1am, staying for about an hour.
Adam and Behati “acted super lovey dovey,” a witness told E! News, “but they didn’t keep to themselves. Both were very social with the rest of the table. Behati has definitely won over his bandmates-they seemed to love her. The girls, too – everyone was getting along great and having fun.”