High Quality Content by WIKIPEDIA articles! XHUAA is the television call sign for the Televisa television station channel 57 in Tijuana, Baja California, Mexico. It is an affiliate of Canal de las Estrellas. XHUAA began broadcasting in digital on UHF 20 in early 2006 making it the second station in Tijuana (and at the time one of very few in Mexico) to have a digital signal (sister station XETV was the first).