It is Hilda Stenmalm, 16 years old who will sing the song and it is written especially for her. Somehow will Eric Saade be involved with the performance.
Hilda's manager comments "Melodifestivalen is always fun, but we have no comments".

Source: http://www.aftonbladet.se/nojesblade...cle15604885.ab

Eric Saade isn't involved in the performance. It just says she's gone the same way, aka through Disney.