Since you live in Los Angeles drive over to Hollywood. There are a lot of Russian music stores on Santa Monica at Fairfax. Also a lot in The Valley. If you are closer to Glendale you can probably find a lot of russian CD's in the Armenian stores. If you don't want to buy just go through the racks then download when you get home.
Glucoza doesn't sing in different octaves, just some sort of electronic sound mix that sounds like she's in an echo chamber. She also sounds like that on her "live" TV concerts, but not on talk shows.