Earlier today we brought you the first preview of the Glee/ Britney Spears theme episode, set to air in the US next week.
Now we have some more insight into what to expect from the episode, including word from the cast themselves.
According to actress Heather Morris, who plays cheerleader/ resident dumb-ass Brittany, La Spears will appear in a dream sequence.
Speaking to TV Week, she said: "Through a special substance, I go under and have a couple of dream sequences - not only myself, but with Santana (Naya Rivera)."
"A lot of it has to do with Will (Matthew Morrison) not allowing us to perform Britney Spears songs, because he doesn't agree with what kind of entertainer she is, so it's our fight to do Britney. But it's not just us doing Britney in show choir; there are other sequences - it's our homage to her."