TVLine reports that the all-female Troubletones will perform a cover of Lady GaGa's 'Edge Of Glory'.
New Directions will cover Meat Loaf's 'Paradise By the Dashboard Light', while Rachel's (Lea Michele) solo will be Celine Dion's 'It's All Coming Back To Me Now'.
Glee will air a special two-part episode on May 15, with the second half centring on Nationals in Chicago. The graduation-centric season finale will air the following week.
The final episode will include covers of Green Day, Beyoncé and Bob Dylan.
> 'Glee' finale predictions: What the graduation songs tell us
Watch a promo for the next episode of Glee 'Choke' below: