Question: What is the quickest way to learn Spanish? (at least enough to safely travel in Mexico)? 

Answer: Being in a situation where you have no choice but to learn the language is the fastest way to learn, but if you listen to the music (works best if you choose a song you like listening to) and can find a web site that has translations for the lyrics, you can learn whole dialogs and conversational pronunciation. Just finding an English version of the song will not help as well because artists may have to change lyrics or verses to maintain the flow of the song as opposed to the meaning of the words.
This question from the Yahoo Q&A forum is categorized in the topic: Entertainment & Music