The 29-year-old will kick off her new Femme Fatale tour on June 16 in Sacramento, California, and said she cannot wait to start even though she expects to be nervous the day before.
She said to ET: 'I'm really excited. I'm probably going to be extra nervous the day before. We've been working hard for, like, two months now and everything's coming together really good.'
The star has spent two months preparing for the dance routines for the tour.
She said: 'It can be kind of [gruelling], especially when you're on stage and you're on your eighth number. You get really winded and you're like: 'How can I do the rest of the show?'
'But I've been training for a while and I actually - before I come to rehearsals - I've been working out and stuff like that so I won't have that predicament.'