The 31-year-old songstress got into the wedding spirit on Wednesday (9 October) by kitting herself (and her band) out in fancy formal wear that was fit for her to walk down the aisle in.
Appearing on daytime talk show The View, Kelly sported a chic gown that featured lace around the bust and shoulders and gorgeous diamond detailing around the waist.
She styled her hair in a glamorous up 'do and accessorised with subtle diamond earrings.
Meanwhile, her 'bridesmaids' wore matching lilac dresses with a bustier-style top and similar diamond detailing to Kelly's frock.
And her band even got in on the fun by going topless and simply wearing a black bow-tie each with their jeans! Although, we're not sure if Kelly would be so keen on that attire on her actual wedding day.
The American Idol winner performed her new Christmas song, 'Tie It Up', for the audience at The View and couldn't help gushing about her love for her soon-to-be husband Brandon.
She said: "He's great. He is the perfect guy for me. We actually grew up in the same small town, which is weird, but we didn't know each other."
Brandon - who has been married once before - popped the question back in December 2012 and he and Kelly are planning to get hitched later this month.
We wonder if she will be wearing this dress to the ceremony?!
What do you think of Kelly's wedding dress on The View? Let us know below, as the best comment each week wins £50!
Watch Kelly's music video for 'Tie It Up' below: