Miley Cyrus Wears Plunging Little Black Dress for Rare Appearance at Star-Studded Summer Party

The star, who performed her hit "Flowers" at the event, was also joined by her family and boyfriend Maxx Morando. The star-studded bash in honor of Gucci's Flora fragrance took place at famed celebrity hotspot Chateau Marmont in West Hollywood, Calif. on July 18.