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This week, Gigi Hadid shows off her hot bod in one teeny, tiny bikini, Michael Phelps enjoys his first days of retirement with his baby boy Boomer and Ali Lohan is grown up and gorgeous!
And, Caitlyn Jenner watches the Olympics with her mother, Diane Kruger takes a seflie from her dentist's office and Yolanda Hadid looks healthy and happy.
Plus, Vanessa Hudgens calls boyfriend Austin Butler the love of her life in super cute birthday shout out, Carey Hart shares a snapshot of his adorable conversation with daughter Willow and Ariana Grande makes the cutest Dorothy from the "Wizard of Oz" in a new throwback shot!
Click "Launch Gallery" above to see these stars' personal pics and even more celeb selfies in this week's best celebrity TwitPics!
