Get ready for a whole new Miley Cyrus. The pop star gave fans a sneak preview of her new single "Malibu" on Wednesday, and revealed she's set to perform the song for the first time at this month's Billboard Music Awards. In an Instagram video, the 24-year-old previewed her upcoming track with snippets of herself frolicking along the beach in breezy summer garb as the track plays in the background.