Summer officially kicked off this week, and Miley Cyrus celebrated in the best way possible — in a bikini, of course. On Wednesday, the 24-year-old singer posted a sizzling Instagram photo of herself wearing a red Triangl swimsuit with her dogs, Emu and Dora. "Summmmmer is heeeeerrrre! Bring on Z fruit, sunshine (always spf), & goooood times!" she captioned it. Between this snap and her music video for "Malibu," Miley has definitely earned herself a spot on our list of this year's hottest bikini moments.