Jennifer Maas TV Business Writer Mattel Television Studios has tapped three new executives for key roles: Sidney Clifton as head of creative for animation, Cory Bennett Lewis as head of production, and Amy Suh as head of creative for live action, scripted and unscripted. The trio of execs will report directly to Mattel Television Studios chief Michelle Mendelovitz. “We are thrilled to welcome Sidney, Cory and Amy to Mattel,” Mendelovitz said.