Jessie J has called on her fans to sing "really loud" at her upcoming Wembley Stadium show.

The singer is taking part in Capital FM's Summertime Ball gig at the London stadium on Saturday (June 9), alongside such acts as Justin Bieber.

Jessie J recorded a special message in an empty Wembley for her fans as she prepares for the show - asking them to create a great atmosphere during her performance. She said in the clip:

"I want to tell you guys that I cannot wait to see you on the 9th June here, when you guys are going to be filling the seats. I can't wait to see you guys there and sing really loud."

As previously reported, Jessie J recently extended her 2012 UK and Ireland summer tour due to phenomenal demand, adding a Nottingham date.

Watch Jessie J speak to her fans ahead of the Summertime Ball below: