LuAnn de Lesseps has revealed she's planning to sing a 'romantic' song for her new husband at their wedding.

The Real Housewives of New York star told DailyMail.com's Femail editor Charlie Lankston she's planning an 'elegant' wedding and with three different dresses - and a special musical performance for her love Thomas D'Agostino.

The 51-year-old reality star and Thomas are set to wed at a hotel in Palm Beach, Florida on New Year's Eve, which is also the businessman's 50th birthday.

And while Luann is definitely inviting costar Dorinda Medley, who introduced the couple, she hinted she's not sure about the rest of the cast after their mixed reactions to her engagement news.

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Engaged: Real Housewives of New York star LuAnn de Lesseps told DailyMail.com she is busy picking out three dresses for her upcoming wedding to fiance Thomas D'Agostino

'I want to do a traditional wedding dress because I eloped the first time,' LuAnn - who was previously wed to Count Alexandre de Lesseps - told DailyMail.com.

'I’ve never been married in church, so I want to do a traditional, elegant long dress with lace.

'And then I want to change for his birthday and wear like a party dress and then it’s New Year’s Eve so I’m thinking sparkle. I’m doing three dresses. Why not? Why not wear three instead of just one?'

'We’re getting married in Palm Beach so I want it be this tropical atmosphere,' she said.

Big plans: The 51-year-old said she plans an 'elegant' wedding with a tropical theme to fit the Palm Springs, Florida location

Surprise in store: The Girl Code singer told DailyMail.com's Femail editor Charlie Lankston that she's plannig to perform a 'romantic' song for Tom at their New Year's Eve wedding, which is also his birthday

The Girl Code singer also revealed she'll be singing a romantic number for her new husband, hinting that it might be Marilyn Monroe-inspired.

The Bravo star said she isn't planning on releasing any new tracks, but teased she has 'something really romantic coming up. I'm working on a song for the wedding.

But with tensions boiling over on this season of RHONY, it seems not all her Housewives costars may be invited.

'Well Dorinda (Medley) introduced us, so definitely Dorinda will be there,' said LuAnn.

As for the rest of the cast, she said: 'let’s see how the Housewives behave at reunion.'

Whirlwind: The Bravo star with businessman fiance Thomas D'Agostino in New York in late January, shortly before their engagement

And the RHONY vet admitted she was surprised a the way some of her costars reacted to her whirlwind engagement, and think some of them are jealous.

Thomas previously dated her costars Ramona Singer and Sonja Morgan.

'We met Nov 24th and we got engaged Feb 5 so you know, it went quickly,' she said.

'I think some of the women are happier than others. I think some of the women are a little jealous because they know Tom and he’s a great guy, so some of the reactions were not what I expected.'

But she's shaking it off and focusing on the future.

'I try not to let those things get to me because I’m happy, I’m getting married, I’ve got great plans and nothing they can say will ruin my happiness,' Luann said.

'I’m having a great time, I’m feeling really lucky that I found love again, that I found my soul mate and that is keeping me really happy.'

However, she said her husband-to-be probably won't be on the show much.

'He’s a businessman so it’s really not his thing but he’s very supportive of me and he knows that it’s my career,' she said.

'You’ll see a bit of him. Think of him as Mr. Big.'

RHONY vet: Bravo is also set to air a special on Luann's life before Housewives after Wednesday's episode

The couple haven't yet decided on a honeymoon, but want something relaxing.

'We’re trying to think how are we going to feel after this 3-day wedding with lots of people, are we really going to want to travel or are we going to want to stay put and do something low-key?' Luann said.

'We’re going to be in South Florida, in Palm Beach so maybe the Caribbean or Mustique or St Barth’s, as opposed to Africa and doing the Orient Express.'

Bravo will air a special on Luann's life before Housewives after Wednesday's episode, which will follow her 'humble beginnings in Connecticut' to her days as a model and Italian TV presenter and then her marriage to The Count.

'He’s thrilled for me. He’s my biggest supporter, he’s happy that I’m getting married again. He’s excited for me,' she said of her ex.

As for losing her Countess title, Luann said Tom teases her about it.

‘He says to me 'You’re going to lose your title and you’re going to marry a commoner!' and I say ‘there’s nothing common about you,' she gushed.