World-renowned photographer Annie Leibovitz has partnered with UBS in a new "transformational" brand campaign for the investment bank. Leibovitz -- who is perhaps most famous for her portrait of John Lennon coiled naked next to his wife just hours before his death -- is collaborating with the bank as it launches a "significant", multimillion-pound rebrand. The global campaign will span TV, digital, print and branded content collaborations and kicks off today, "Marketing" reveals.