Appearing as a guest star in Glee seems to be the new cool thing to do, with everyone from Jennifer Lopez to Britney Spears wanting to have a go. The latest celeb signing on the dotted is reportedly Matt Lucas, who has agreed to play the part of an English teacher with a secret love of musicals. Earlier this week, Glee star Jane Lynch (Sue Sylvester) admitted the cast and crew are also “desperate” to sign up Britain’s Got Talent singing sensation Susan Boyle to appear as a dinner lady. “Susan is really popular with all of us,” explained Jane. “I heard Ryan Murphy [the show’s creator] say he’d love to get her on set playing a dinner lady, so let’s hope.” We really hope this happens. Imagine Su-Bo on Glee!