2x Biffy Clyro iTunes Festival tickets to swap for other tickets (Preferably Jessie J) .

Hi, I have won two tickets for Biffy Clyro and Frightened Rabbit at the iTunes Festival on the 22nd Septemeber and am looking to swap for any of these: Jessie J (Preferably) Ellie Goulding Example Labrinth Alicia Keys David Guetta P!nk Madness I will sell both tickets for 15 if no one is willing to swap.