Boyband newcomers Lawson and rappers Skepta and Devlin have also been added to the event, which takes place in Weston-super-Mare on July 1.
Britain's Got Talent winners Ashleigh & Pudsey will take to the stage to perform a routine, while previous T4 presenters June Sarpong and Vernon Kay return to the event to celebrate its 10th year.
The Wanted, Little Mix, Rita Ora, Alexandra Burke, Marina and the Diamonds and Labrinth are among the acts previously confirmed to play this year's T4 on the Beach.
The cast of Made in Chelsea will be among a host of special guests participating in-on stage games throughout the day.
Tickets for T4 on the Beach 2012 are on sale now.
Watch the music video for Taio Cruz's 'Troublemaker' below: