Katy Perry ‘suspicious about Russell’s romance’

Katy Perry is reportedly concerned that Russell Brand had "after yoga lunches" with his new girlfriend while they were still together.

Russell filed for divorce from Katy in December after 14 months of marriage. The paperwork has now been signed by both parties and Russell has moved on. He is dating artist Oriela Medellin Amieiro, who he met at yoga lessons.

Katy is apparently upset that he has moved on so fast, even though she knows the romance didn't start until after their break-up.

"She says it's like Russell's got off one bus and straight onto another without a care in the world," a source told Look magazine.

"I think Katy's convinced herself there were after-yoga lunches where they discussed her and their relationship, and she can't be happy about that."

Katy is rumoured to have had a hard time coping with the end of her marriage.

She reportedly burst into tears after leaving Russell following a meeting about their divorce and gave a fiery performance at the recent Grammy Awards which some claim was aimed at her estranged husband.