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 looking purr-fect
Pixie Lott's been showing her fans (the Crazy Cats) that's she's feline fine in the sunshine.
Pixie was snapped wearing 'cats ears' as she popped out to lunch in LA.
Pixie has been the States for around a month now working on new material as she aims to follow up her debut album Turn It Up.
She has been working with producers and songwriters, including Dallas Austin and Toby Gadd.
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.