When JAY-Z and Timbaland needed to defend their use of a sample in the 1999 smash "Big Pimpin'," Christine Lepera was at the ready. Her argument was so airtight that the suit was dismissed before it even went to a jury. Legal victories like that have made Lepera one of the most sought-after copyright litigators in the music industry. In January, Lepera won a copyright infringement