The Olympic swimmer, 25, is expecting her first baby with husband Harry Needs and found herself getting overly-emotional in front of the box last night.
To be fair though, she was watching this year's John Lewis advert featuring Monty The Penguin!
The former I'm A Celebrity..Get Me Out Of Here! star took to Twitter and told fans: "Awwww, just saw the John Lewis penguin advert for the first time and I started crying!!! I blame pregnancy hormones! So sweet!"
At the beginning of this month, Rebecca confirmed her pregnancy, telling fans that she "can't wait" to become a mum.
"We're so excited! I can't wait to be a mum! #pregnant #excited," she tweeted.
Harry, meanwhile, also told his followers: "Holy smokes I'm gonna be a dad & I'm SOO excited! #Shotgun no early morning swimming pool runs #blessed #waterbaby."
On Saturday night (6 December), the couple were pictured arriving at Ronan Keating and Cancer Research UK's Emeralds & Ivy Ball in London. Rebecca kept her tummy hidden under a loose blue dress but she looked glowing as they posed for pictures.
Rebecca and Harry's happy news came exactly three months after they married in front of family and friends in Staffordshire. In 2012, Rebecca confirmed that she was retiring from competitive swimming.
Celebrities who have announced baby news in 2014:
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