The 31-year-old singer shared her tour must-haves with ET on Saturday.
Auditions began today in Orlando and Portland, but a big piece of the puzzle is still missing.
The 'Witness' world tour will now kick-off three weeks later on Sept.19.
The pop star apologized to her fans for the "inconvenience."
The song in question has many questioning whether Mayer is still pining over ex-girlfriend, Katy Perry.
He opened up about how one new song is inspired by a recent breakup.
No 'respectful, loving space' here!
The 'Witness' singer gets candid about her famous ex-boyfriends in the new interactive issue of 'W' Magazine.
The 32-year-old pop star covers the September issue of 'W' magazine.
Celebs are living it up this summer - check out their fun outings!
The rapper opens up to 'Rolling Stone' about collaborating with T. Swift on the rumored diss track.
The rapper also reveals what it's really like to work with Beyonce.
A stellar lineup of music's hottest stars are set to take the stage for the annual awards show.
Inside Robert Pattinson and Katy Perry's Fun Dinner Outing in LA
