This week, "Jersey Shore's" Ronnie Margo does his best Wolverine impression, Miley Cyrus "Can't Stop" sticking out her tongue and Hilary Duff takes Luca on his first hike!

Also, Justin Bieber has a bad case of the giggles, Julianne Hough is in love (again!) and Miranda Lambert shares the cutest/funniest picture of Blake Shelton that we've ever seen.

Plus, Jordin Sparks shows off her makeup-free face, Kylie Jenner gets a new piercing, and Ian Somerhalder posts a picture of his butt!

Click "Launch Gallery" above to see these stars' personal pics and more in this week's best celebrity TwitPics!

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