*Gleeks are buzzing about this preview clip of next week’s “Glee” episode featuring a sequence in memory of Whitney Houston.

The scene has Mercedes (Amber Riley), Rachel (Lea Michele), Santana (Naya Rivera), and Kurt (Chris Colfer) singing an acapella version of Houston’s classic “How Will I Know.”

From the clip, it appears Houston’s death has really affected Mercedes, who has turned her locker into a mini-shrine dedicated to the late diva.  Gone is the song’s upbeat tempo, replaced with a more somber arrangement fitting the tragedy of Houston’s death.

Watch below.