As previously revealed, The Inbetweeners star features in the Stephen Lally-directed promo for the group's track 'Already Gone'.
"I'd never ever done anything like this before so I was actually a bit nervous on the day, but it was probably the best job I've ever done; dancing in glamorous outfits with four good looking boys for the best part of a day! It was so much fun," Atack told Digital Spy.
"The director basically told me to seduce the guys in the main shot. I did apologise for nibbling on a few of the guys' ears after some of the scenes. But mostly it was quite freestyle for my solo performances, so I just did all the kinds of things you used to do in your bedroom in front of the mirror. It was great."
Atack added: "Would I do it again? Absolutely! I had a great time and I love The Kixx. I'm hoping to go and see them when they come to London in a few weeks."
The foursome (above) - Dave May, Jack Guppy, Robbie McDade and David Gibbs - are currently preparing to support Olly Murs on his upcoming UK tour.
The Kixx release 'Already Gone' on June 5. Watch the video below: