The Saturdays star went to Woburn Safari Park in Bedfordshire and it wasn't long before a giraffe had poked its head into her car!
Una, 32, loved her family day out, Tweeting: "Got up close and personal with the wild animals at @woburn_safari today @Ben_foden Aoife Belle and I had so much fun! it was amazing! X"
She also added some videos of their fun day at the safari park.
Our favourite is when hunky rugby star bends Ben holds little Aoife as they feed the giraffe some lettuce.
Watch Ben and Aoife here...
Aoife also loved the bears and monkeys...
Mum-of-one Una and the rest of her Saturdays bandmates have been promoting their latest song 'Not Giving Up', and she's not the only one making the most of a day off work.
Rochelle Humes spent her Monday cooking up a storm in the kitchen!
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