Diet Coke and Pepsi are going head to head. As previously reported, Beyonce has recently signed up as brand ambassador for Pepsi, appearing in their TVC’s and debuting new material across the brand’s communications. Almost in retaliation (not really, these partnership ideas would have been hatched many, many months ago), Diet Coke’s new spot features Taylor Swift, another global heavyweight of pop, (thrillingly) supposedly in the process of penning her next single. Taking into the account the creative narrative of each campaign, the respective artists involved and the final executions, we’d say Pepsi wipe the floor on this one. What do you think? Click above to see Diet Coke and Taylor’s effort.