CSJH sub-unit Dana & Sunday made a triumphant comeback on tonight's episode of 'M! Countdown' with their new track, "One More Chance". After a four-year hiatus, these ladies stormed onto the stage with sass and confidence - they were ready to show the world that time hadn't dulled their verve, and that they were ready to usher in a new phase in their career. Check out their performance, and tell us what you thought about it below!