Published Friday, 08 June 2012
The I Kissed a Girl hitmaker wed funnyman Brand in India in October 2010 after a whirlwind romance, but they announced their split just 14 months later and filed for divorce earlier this year.
Perry has declined to discuss the break-up in detail but has now told how she covered up her sadness to perform for fans as her marriage fell apart.
She tells talk show host Graham Norton: "I love being on stage and even though I went through some pretty tough times last year I had to separate that because I know my problems are my problems and they are not the audience's problems.
"They are here to see a show and to be entertained, so I got on that lift, put a smile on my face and went up (on stage) with my t*** spinning!"