Blame it on the woman with the best boobs!
While we're sure Katy Perry could lure almost any man away from his woman, we're not so sure that's actually how she spends her time.
You know, she does have a crazy successful music career to focus on!
We'd guess KStew's whole cheating dramz played the main role, but rumors are running wild that it's Katy who might have caused the split.
"[She] played a role, as one of many reasons."
Uhh, unless that role has been comforting one or both of them then we're not sure what that role could be!
But we guess if you marry one Brit, everyone assumes you'll date all Brits!
[Image via Adriana M. Barraza/WENN.]