Demi Lovato Returns to 'Glee' Tonight!

Demi Lovato is back for an all-new episode of Glee tonight.

In “Trio”, With graduation approaching, Tina (Jenna Ushkowitz) is worried about losing her McKinley family after they all go their separate ways. In order to make the time they all have left together more memorable, she, Blaine (Darren Criss) and Sam (Chord Overstreet) decide they need to say goodbye to their alma mater in dramatic fashion by staging a Senior Lock-In.

But, when Principal Sue (Jane Lynch) abruptly cancels the event, the trio decides to take matters into their own hands, and get more than they bargained for.

Meanwhile, Elliot (Adam Lambert) finds himself in the middle of Rachel (Lea Michele) and Santana’s (Naya Rivera) fight.

“Trio” airs TONIGHT, Tuesday, March 4th @ 8PM ET/PT on Fox. 10+ stills inside from Glee…