Little Mix, Camila Cabello to perform on 'Britain's Got Talent'

"

Britain's Got Talent

" has unveiled its guest performers for the live semi-finals and final, which includes girl group

Little Mix

.

Throughout the semi-finals over the next week, there are set to be many performers starting with

Alfie Boe

and

Vera Lynn

as a hologram.

They will be followed by ex-Fifth Harmony member Camila Cabello, the cast of the "Bat Out of Hell" musical and former "

X Factor

" contestants 5 After Midnight, who will perform their debut single.

Little Mix and previous winners Diversity are set to team up for a "special performance" during the final next Sunday, June 4.