LOS ANGELES (Reuters) - R&B singer Beyonce and rappers Eminem and Iggy Azalea led the nominations for the MTV Video Music Awards, one of the industry's top televised showcases, the cable TV network said on Thursday. Beyonce garnered eight nominations and will go up against Azalea in the coveted Video of the Year category at the Aug. 24 awards show, which attracts a young audience prized by advertisers. Eminem and Azalea, an Australian rapper who has broken out internationally this year with the hit "Fancy," each scored seven nominations. ...