Perhaps she was still thinking about husband Patrick Kielty's recent interview in which he recalled their courtship?!
The So You Think You Can Dance USA host was among a string of celebrities at the Samsung celebrates the new Galaxy S6 Edge and Galaxy Note 5 bash in LA on Tuesday night (18 August), standing out from the crowd in a blue silk jacket.
She was without Northern Irish comedian husband Patrick, who divides his time between LA and his work in the UK.
In a recent interview with Daily Mail, he explained how his friendship with Cat evolved to romance: "Cat was in LA and I was in Northern Ireland, so I texted her to wish her a happy birthday.
'When she said she was having a birthday lunch at the Beverly Hills Hotel, I said I'd be there. She told me to go to sleep as I was drunk. That was 2am. I got up at 5am, went to Belfast airport for 6am, got the 7.15am flight to Heathrow, landed at 8.30am, took off again at 9.40am and arrived in LA at 1.15pm.
"I was at the Beverly Hills Hotel by 2.15pm. When I walked in, Cat looked at me and said: "Oh, you're good!"'
He added: "There had always been a spark between us, but either she was with someone or I was, and then she moved to LA, so opportunities for something to develop were limited. Unless someone was stupid enough to get on a plane, nothing would have happened."
They married in Rome in 2012.