Photo: WENN.com
Jessie J, Calvin Harris and Labrinth have been confirmed to perform at next year's Wireless festival.
Rihanna, who is set to headline, will play her only UK show of 2012 at the festival on July 8.
The festival will once again run over three days from July 6-8.
The London festival was headlined by Black Eyed Peas, The Chemical Brothers and Pulp earlier this year.
For more information about Wireless and next summer's festivals, check out the Gigwise Festival Guide
Meanwhile, Will.I.Am is set to join Jessie J as judges on BBC's talent show The Voice, it has been confirmed.
The Voice was launched in the US this year features Christina Aguilera, Adam Levine, Cee Lo Green and Blake Shelton as judges.
Wireless Festival 2011: The Best Bits In Photos
