Leona Lewis is the Celine Dion for James Cameron’snext global smash. The British singer will perform the tune that willaccompany the closing credits of Cameron’s highly-anticipated “Avatar.” It’s called “I See You.” James Horner and Simon Franglen – the men behind Dion’s “Titanic” hit “My Heart Will Go On” – are producing the song. Lewis, who was recently in the news when she was assaulted at a book signing, has just released “Echo“, the follow-up to her multi-million selling debut album.