Frankie Sandford is celebrating her 23rd birthday today and the rest of her bandmates have taken to Twitter to wish her well. 

The singer famously took time out from performing with The Saturdays earlier last year, but has now reunited with the popular girl group and is enjoying being back in the line up. 

Blonde bombshell Mollie King wrote, "Happy Birthday my little sis! Love u so much!! Mwahhhh xxxx", and newly engaged Rochelle Wiseman added, "Happy Birthday @FrankieTheSats wooooo party times *bbm dancing* :) xx".

In addition to tweeting about her birthday, Sandford also admitted that she's a big fan of X Factor finalist Cher Lloyd and shared the young singer's latest music video with her followers:

"Love this new @CherLloyd video is it just me or is she getting hotter and hotter?!"

Watch backstage footage from The Saturdays' 2011 UK tour below: