The 29-year-old 'Roar' hitmaker had an on-and-off relationship with Meyer since 2012. The duo parted ways in February, reported E!Online.
"She is in great spirits right now. Katy is focused on her tour right now. She is not allowing anything to distract her from it," a source said.
The singer, who was previously married to funnyman Russell Brand, has split with Meyer twice before. But this time she was reportedly convinced that their relationship was over for good.