Drop everything you are doing immediately - you really need to hear this.
The track is played over a montage of exclusive pics from the pair's first set of nuptials, which took place in the Bahamas in January.
Posting the video on Twitter, wannabe popstar Katie wrote: "Right hope this works…hear me singing to @kieran0322 at our wedding and exclusive pics from our Bahamas wedding xxx"
The video was uploaded to Kieran's YouTube account and underneath he wrote: "The song my wife sang to me at our wedding on 29th March 2013."
Union J's Jaymi Hensley was also on the guestlist, and he claimed that Katie handed out a CD of her masterpiece to everyone there.
It isn't Katie's first foray into music, as she famously tried to represent the UK at Eurovision in 2005, performing on selection show, 'Making Your Mind Up' while she was heavily pregnant with son Junior.
And then there was her attempts to fully launch her pop career with single 'Free To Love Again' in 2010, which limped into the charts at number 60.