'Young' singer Tulisa Constostavlos has been asked by Marvin Humes and his fiancee, Saturdays babe Rochelle Wiseman to sing at their upcoming summer wedding.
23-year-old Constostavlos is part of the popstar line up along with Olly Murs and Pixie Lott who have also been asked to perform for the couple at their July nuptials.
JLS singer Marvin and Rochelle have set a dress code to the adults-only party, with men attending the reception being asked to come in black tie, whilst women must wear a black cocktail dress.
Invitations to the event are said to be matching the dress code, and will also be in black and white with a diamanté center.
To mix things up a bit, the couple have asked guests to make a donation to charity rather than buy wedding gifts, with Wiseman supporting Marie Curie Cancer Care and Humes choosing his own JLS Foundation.
"Marvin and Rochelle have gone all out for their wedding - it's totally over the top. But they're keen for some charities to benefit from the big day too," a source said.
"So if people do decide they want to give them something, they'd much rather it went to less fortunate people."
The pair, who recently got engaged in the Caribbean, have agreed to sell photographs of their big day to a magazine for a hefty six-figure deal, The Sun reports.
Rochelle And Tulisa Enjoy A Girls Night Out In London...
Rochelle Wiseman and Tulisa enjoy girls night out in London. (Photo credit: Splash News)