Las mañanitas

"Las Mañanitas" is a traditional Mexican birthday song written by Mexican composer Alfonso Esparza Oteo. It is popular in Mexico, usually sung early in the morning to awaken the birthday person, and especially as part of the custom of serenading women. A famous rendition of "Las Mañanitas" is sung by Pedro Infante to "Chachita" in the movie Nosotros los pobres. It is also sung in English in The Le... (Wikipedia)