Next month, Levi's will use a piece of classical music in its advertising for the first time. Handel 's Sarabande in D Minor will be the soundtrack for its new commercial - and, quite possibly, an unlikely Pepsi chart hit before the spring is out. After all, Levi's ad campaigns have proved a reliable means of turning old or obscure pieces of music into massive hits, so far achieving eight number ones, including hits for The Clash, Stiltskin and Babylon Zoo.