Leona Lewis to guest star on Glee?

It has been recently announced that John Stamos is going to guest star on the 2ns season of Glee as Emma;s boyfriend dentist.

Well now rumors are speculating that Leona Lewis might be guest starring on the 2nd season of the show. The cast has been promoting the show in London where Mathew Morrison, Chris Colfer and Kevin McHalfe spotted Leona Lewis at a club.

Leona Lewis on Glee would interesting. What do you think?