<p>Foreign language is one of the “core” classes (ie., you need to have one each of English, Math, Social Science, Science, Foreign Language).
For UCs, you also need one art class, so choir would count, but it wouldn’t excuse you from a 3rd class of Spanish unless you score 520+ on the SAT Subject test. (For UCLA, you will have to have 3 years).
You could also take Spanish 2 at the local community college over the summer, and then you could take choir during the year.</p>