Lingerie giant Victoria's Secret is waging a cross-border bra battle with La Senza over who can lay claim to selling the world's comfiest brassiere. In documents filed with the Ontario Superior Court of Justice, U.S.-based Victoria's Secret accuses the Canadian panty purveyor of stealing sales with a "knock off" push-up bra, one that is inferior to its patented IPEX wireless offering -- the "world's most advanced bra." "The defendant is passing off its wares" as Victoria's Secret bras, the claims says. Staff are pushing La Senza's new bra line when they answer the phone at the Canadian company's Toronto Eaton...