Intro (Repeat twice): E|---------------------------------------------------------| B|-----------3-------------3-------------3---------1p0-----| G|-----4-------------4-------------4-------------4-----2p0-| D|---2-----2-------0-----0-------2-----2-------2-----------| A|-----------------------------3-----3-----3-3-------------| E|-0-----0-----0-3-----3-----3-----------------------------| Rhianna and Katy Perry Part (and optional Beiber part at the end): E|-----------------------------------------------------------| B|-----------3-------------3-------------3-------------3-----| G|-----4-------------4-------------4-------------4-----------| D|---2-----2-------0-----0-------2-----2-------2-----2-------| A|-----------------------------3-----3-----3-3-----3-----3---| E|-0-----0-----0-3-----3-----3-------------------------------| Lady Gaga Part: E|-----------------------------------------------------------| B|-----------------------------------------------------------| G|-----------------------------------------------------------| D|-----------------------------------------------------------| A|-----------------------------3-------------3---------------| E|-0-------------3-------------------------------------------|