Tivoli's own hotel magazine includes Gaga among its 2012 guests; Jornal do Brasil contemporaneously identified her accommodation and arrival at Tivoli Mofarrej São Paulo, while later Veja São Paulo and Bloomberg Línea coverage preserves the same exact-property connection.
Lady Gaga stayed at Tivoli Mofarrej São Paulo during the Brazilian leg of her Born This Way Ball tour in November 2012. The conclusion is supported by Tivoli's own hotel magazine, a contemporaneous report from outside the property, and later independent coverage that connects Gaga to the hotel's Presidential accommodation.
Source conclusion:
The cited sources support a stay at the named hotel.
