Mollie, Rochelle, Vanessa and Una were greeted by huge crowds on the famous shopping street, although Frankie was still absent from the line-up.
After the big switch on, the girls delighted fans with a performance of their new single ‘My Heart Takes Over’.
In a message on Twitter earlier in the day, Mollie said: “Sooo excited to be turning on Oxford Street’s lights!!! Are u coming down to party? Xx”
‘My Heart Takes Over’ is the latest single to be taken from The Saturdays‘ new album ‘On Your Radar’, which is due to be released later this month (November).
The girl group are currently giving fans the chance to preview their new record via their official website.