The 'My Life Would Suck Without You' singer beamed for the cameras as she attended a photocall for Citizen Watch Company in New York City on Tuesday (3 November).
Kelly is expecting her second child with husband Brandon Blackstock - a boy!
They're already parents to daughter River Rose, one.
Kelly, 33, blurted out her pregnancy news during a concert in Los Angeles in August, telling the crowd she hadn't even told talent manager Brandon she would be sharing their baby joy at that moment!
She told the audience: "I wasn't planning on announcing… totally pregnant! I would like to apologise to my husband.That was not planned. I just didn't want you to think I was crazy or something. Honestly I'm so hormonal today. Nothing's wrong, everything's great. I haven't vomited yet. That's a win, y'all!"
Kelly revealed it was a boy last month.
Original American Idol Kelly is a brand ambassador for Citizen Watch's Better Starts Now campaign, which aims to spread the message that it's always possible to make something better and it's never too late to start.