Welcome back to social media, Hayden Panettiere...you look different. The 30-year-old Nashville alum returned to Twitter for the first time in 10 months on Wednesday, with a throwback look. She posted a selfie, showcasing her new pixie cut, and wrote, "Channeling my inner #Kirby #Scream4 Thanks to my boys ⁦@anthonyleonard❤️," referencing her character's hairstyle in the 2011 horror sequel and tagging her hairdresser. Leonard Zagami, the hair guru behind her transformation, tells E! News exclusively, "Hayden was looking for a radical change, so last night we just went for it! It's a modern version of a classic pixie style with a little more of an edge. The color is...