The acts are reportedly all on the guest list for Humes and Wiseman's big day and could make an appearance on stage.
Pixie Lott's model search
The singer is looking for two girls to model her fashion line
Pixie is launching her new collection in collaboration with online retailer Lipsy.
The "Mama Said " star will unveil her Spring/Summer 2011 line on April 21st in London and is looking for two girls to model the clothes at the event.
The chosen models will bag a contract with Lipsy, £2000 worth of clothes vouchers, a beauty goody bag, an interview in Lipsy magazine and four tickets to the Pixie Lott fashion show for the clothes brand.
Wannabe models can apply through Lipsy's Facebook page.
Pixie Lott, Jessie J and Florence Welch talk exclusively to Heart about their amazing red carpet outfits. Take a listen!
Pixie Lott dresses like Madonna in the music video for her new single, Kiss The Stars.
Pixie Lott has revealed that she wants to work with Ed Sheeran and Jessie J.