The group, who were recently denied the number one spot on the singles chart by the rapper's 'Club Can't Handle Me', thanked him for featuring on the song via a letter.
It read: "We are sorry we couldn't be around today - we are gutted to have missed you!
"We want to thank you so much for doing the track with us. We are so excited that you are a part of it! Have an amazing time shooting the video and we hope to meet you really soon."
Flo Rida responded by tweeting: "Thank you for the letter and the opportunity to collab with you! the song is a smash."
Band member Rochelle Wiseman recently joked that they should collaborate with Flo Rida to get a number one single after being beaten by him on two ocasions.