In my trip to Barcelona this past weekend, I was not surprised to see a number of American products. Eva Longoria once again was advertising ice cream. In Spain, George Clooney even has his own product endorsements.
If you are looking for American fast food, you will quickly find McDonalds, Burger King, Pizza Hut and KFC. I would choose paella any day over these fast food palaces.
And if you are worried about not liking Spanish music, don't let it last for too long because just like in Italy, Madonna is in the top twenty songs and this time, so is Rhianna. You even have the opportunity to go to an Avril Lavigne concert in Barcelona instead of spending time do anything to learn about the culture of Spain.