Self-Portraits Kim Kardashian, MC Hammer & More Celebrity Twitter Pictures (Photos) Christy Khoshaba08.05.12Self-Portraits Kim Kardashian, MC Hammer & More Celebrity Twitter Pictures (Photos) Anderson Cooper is welcomed to Instagram, Avril Lavigne plays sailor, and Jared Leto gets scruffy. Plus, more of the stars’ Twitter photos from this week.Christy Khoshaba08.05.12 8:45 AM ETAnderson Cooper is welcomed to Instagram, Avril Lavigne plays sailor, and Jared Leto gets scruffy. Plus, more of the stars’ Twitter photos from this week. WhoSay.com / Miley CyrusMiley CyrusGood morning, Miley! The Disney star who had yet to get the little crust-ies out of her eyes snapped a photo of herself beside her doggy, Zigz. The newly blonde gal tweeted, “Ok don't judge my hair I just woke up. But look at Zigz face :) she looks like she guarding purgatory. So wise.” WhoSay.com / Anderson CooperAnderson Cooper Hallelujah! The very handsome CNN anchor Anderson Cooper made girls and guys jump with joy when he finally (!) launched his Instagram account. He simply tweeted, “Just posted a photo.” And TV host Kelly Ripa retweeted it: “You are so gorgeous. That’s all,” she wrote. Ripa wasn’t the only one who thought so. Just take a look at Cooper’s comments. WhoSay.com / Alexa ChungAlexa Chung Cool you are, Ms. Chung. Wearing a floral dress and clutching a vintage Louis Vuitton, the British model and former TV host threw on a pair of awesome sunnies among some colorful trinkets. Her tweet? Four peace signs in a row. Thumbs up to that. WhoSay.com / Jason MrazJason MrazThe singer-songwriter performed “I Won’t Give Up” on Conan O’Brien’s talk show this past week. Mraz’s appearance backstage was fun, too. “Look who I ran into backstage at Conan, @sabramay as Posh Spice,” he tweeted. Looks like they are currently both donning some longer hair. WhoSay.com / Kim KardashianKim Kardashian After what seemed like forever (two very long days!) since Kim K posted a photo of herself on Twitter, she gave us a fun one. Kardashian sat pretty against a green screen and got goofy. She tweeted a wink. That’s all she needed to redeem herself. WhoSay.com / Avril LavigneAvril Lavigne At a photo shoot for the singer’s fashion line featured at Kohl’s, Lavigne lets off some steam with her hair and makeup artist. She took a stab at some role play: “Hey @GABRIELPANDURO I'll be your sailor if you be my queen hehehe. Ok lunch break is over back to shoot @AbbeyDawn,” she tweeted. WhoSay.com / MC HammerMC HammerWhen he’s not rapping on stage as MC Hammer, Stanley Kirk Burrell is being a family man. Here he gives a shout out to the ones who mean most. “Treach, Mike and The Hammers !!! Family Affair #Naughty,” he tweeted. We get the family tweet. But what’s up with the “Naughty” hash tag? Rachel ZoeLoving motherhood, the super stylist dressed herself and her son in matching gear. “Our matching panama hats are a hit today around RZ HQ...” she tweeted. Her little one gets cuter and cuter by the day. WhoSay.com / Jared LetoJared LetoThis musician’s scruffiness isn’t bugging anyone. As one commenter said, “Dirty and hot” all in one. Regardless of his status, Leto had a Kodak moment as he posed with pro skateboarder Bam Margera. WhoSay.com / Candice SwanepoelCandice Swanepoel The Victoria’s Secret Angel smooched her fans buh-bye for the summer. “My last day at work today! Kiss to you all,” she tweeted. Swanepoel and her team will be back sporting sexy lingerie and barely-there panties in no time. Don’t worry!