Two months after her untimely death, Whitney Houston and her music will be the focus of next week's episode of Glee titled Dance With Somebody.

FOX television on Thursday (19 April) released a preview video of one of the episode's most powerful musical numbers: How Will I Know.

It features two of the show's gay characters, Kurt (Chris Colfer) and Santana (Naya Rivera) singing background to the powerful lead vocals of Mercedes (Amber Riley) and Rachel (Lea Michele) in this slowed-down a capella version of one of Houston's early hits.

The episode, to air next Tuesday (24 April) will feature seven other Houston songs including Saving All My Love For You, So Emotional, I Have Nothing, My Love is Your Love, It's Not Right But It's Okay and I Wanna Dance With Somebody (Who Loves Me).