Self-PortraitistsRyan Lochte, Alicia Keys & More Celebrity Twitter Pictures (PHOTOS)Jean Trinh04.28.13Self-PortraitistsRyan Lochte, Alicia Keys & More Celebrity Twitter Pictures (PHOTOS)Tori Spelling celebrates Earth Day with her kids, Jeremy Piven goes old English, plus more of the week’s best celebrity Twitter photos.Jean Trinh04.28.13 3:00 AM ETTori Spelling celebrates Earth Day with her kids, Jeremy Piven goes old English, plus more of the week’s best celebrity Twitter photos. UsherAs the old adage goes, “See no evil, hear no evil, speak no evil.” Are the men of NBC’s The Voice trying to give us a message about the pressures of judging in this photo Usher posted on Twitter? The rapper and Shakira replaced judges Cee Lo Green and Christina Aguilera in the fourth season of the show, and the original members are expected to return for the fifth season. Kevin JonasWe’re getting up close and personal with the Jonases! Kevin Jonas and his wife, Danielle, tweeted this pic of themselves dolled up for the E! 2013 Upfront event in New York. The twosome’s second season of Married to Jonas premiered on E! on April 21. Tori SpellingStars, they’re just like us! They also care about the environment! Tori Spelling, looking like a flaxen-haired angel, took some time with her kids to plant in the garden in this snapshot she uploaded to the Twitterverse. Heidi KlumLights, camera, action! Heidi Klum gave fans a behind-the-scenes look on her promo shoot for NBC’s America’s Got Talent in this Twitter photo. The model and former Spice Girls member Mel B joined the cast for the eighth season of the competition show, alongside Howard Stern and Howie Mandel. Ashley Tisdale“Happy earth day from Paradise!” tweeted Ashley Tisdale about this snapshot. The bikini-clad singer and actress posed in front of a luxurious pool, revealing her svelte figure. Earlier this year, she was cast to act alongside Nicholas Cage in upcoming rapture film Left Behind. Alessandra AmbrosioGrown-ups aren’t the only ones that get to have fun at Coachella! Supermodel Alessandra Ambrosio brought along her little tyke, Anja, with her to the music and arts festival in Indio, California. She posted this photo of their mother-daughter bonding time. Alicia KeysAlicia Keys is sizzling hot in this Twitter pic she posted, posing alongside crooner Maxwell. This week, the duo released their “Fire We Make” music video—a production shot in New Orleans, showing some bare, sweat-glistened skin. Jamie OliverJamie Oliver is taking full advantage of the digital world with his YouTube channel, FoodTube. The live-format program features the mega-chef and his friends on a culinary journey, and he describes his show on his website as “a place where you can come for all your cooking needs.” He Instagrammed this photo of him and his gang just moments before his show filmed this week. Gisele Bündchen“Happy Earth day!” Gisele Bündchen captioned her Twitter photo, as she yogi-posed in a lusciously green Zen garden, complete with a mini-waterfall. The supermodel looks so good it’s surprising she just had her baby, Vivian Lake, a few months ago! Jeremy PivenLooking dapper as ever, Jeremy Piven posed next to some early-1900s-style gowns, and captioned his Twitter snapshot “Back on it for season two.” The actor stars in PBS’s Mr. Selfridge, a British-period drama about an American department store owner in London. Ryan LochteJeah! Love him or hate him, we can’t get enough of Ryan Lochte. The Olympic swimmer and now reality-TV star of E! show What Would Ryan Lochte Do? visited CBS’s Late Show With David Letterman this week. Lochte tweeted this pic of his well-groomed self in a fitted suit, and wrote, “Thanks David Letterman for having me on tonight.” Jennifer HudsonAmerica’s sweetheart, Jennifer Hudson, is back in the recording studio! The singer Instagrammed this photo of herself, revealing a blunt-bangs ’do. She recently starred as a woman suffering from PTSD in the Lifetime movie Call Me Crazy.