Niña de mi corazón (English title: A Double Identity) is a Mexican telenovela produced by Pedro Damián for Televisa that aired on Canal de las Estrellas from March 8, 2010 to July 9, 2010. It is a remake of the Mexican telenovela Mi pequeña traviesa, also produced by Pedro Damián.Paulina Goto and Erick Elías starred as protagonists, Maribel Guardia and Arturo Peniche starred as co-protagonists, while Lorena Herrera, Lisette Morelos Julio Camejo and Martha Julia starred as antagonists.

In the United States, Univision broadcast Niña de mi corazón from February 28, 2011 to June 17, 2011.