Girl group Fifth Harmony will release their highly anticipated debut studio album, entitled 'Reflection', in December and MTV has now teased that they're planning something special to celebrate the occasion with. 

'Reflection' has been confirmed to drop on December 16 and Amy Doyle, the executive VP of music and talent programming strategy at MTV, told Billboard that they will welcome the record with a bang although details of the event are still very much under wraps:

"We're still developing the creative and details around that, but we're looking to do something really big, really loud and definitely live."

Earlier today (October 29), meanwhile, music mogul Simon Cowell promised Harmonizers around the globe that he's working hard to try and bring the girls to the UK for an appearance on 'The X Factor' and he tweeted: "We are working on it. I have to hand it to @LA_Reid and Epic. They have worked really hard to make a fantastic record. And thank you to every Harmonizer who have stuck by the group. That's real loyalty."

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Listen to the girls' new single, 'Sledgehammer', below: