Ed Sheeran, Little Mix, Will.i.am confirmed for Britain's Got Talent 2014 performances

A star-studded line-up of popstars including Ed Sheeran, Little Mix and Will.i.am have been confirmed for guest performances on the Britain's Got Talent 2014 finals.

The annual run of live shows begins on Monday, as the judges' top 45 acts - including their four golden buzzer picks - take to the stage in an attempt to impress the nation and secure viewer votes.

The first special guest joining them on Monday 26th May is former X Factor contestant Ella Henderson, promoting her brand new single 'Ghost' after working on material for over a year.

Ed Sheeran appears on Tuesday 27th, performing 'Sing', the first single off his new album 'X', followed by teen pop band The Vamps with their top 5 smash 'Last Night' on Wednesday 28th.

The semi-finals come to an end on Thursday 29th with a set from Will.i.am - a coach on rival show The Voice UK - introducing his new single 'Birthday'.

As happened last year, the grand final will take place a week later on Saturday 7th June, with former BGT contestants Attraction and Richard and Adam welcomed back for new performances.

Little Mix will also join forces with BGT alumni Diversity for an exclusive routine set to their new single 'Salute' - before a yet-to-be-confirmed 'special guest' drops by to round off the series.

It is widely expected that the mystery celeb is returning X Factor judge Cheryl Cole, who is rumoured to be planning an 'epic comeback' with new solo material.

> Britain's Got Talent 2014 semi-finals: Dates, start times, acts - all you need to know

The first Britain's Got Talent live show of 2014 airs this Monday at 7.30pm on ITV.