Houston's biggest hits were performed on the show, including a surprise rendition of her more recent song 'It's Not Right But It's Ok', reported Contactmusic.
The characters in the musical used the songs to convey their feelings. The theme being graduation was about acceptance and moving on and seemed apt given the tragic death of Houston, 48, in February.
The episode was a celebration of Houston's career, and Rachel and Santana did a routine to 'So Emotional'.
Brittany and Santana performed 'I Wanna Dance With Somebody', hinting at romance between the two.
"So excited for tonight's episode though! Our tribute to the amazing Whitney," Glee star Lea Michele tweeted before the episode aired.
The Glee tribute was the second most notable tribute to Whitney Houston, following American Idol's Whitney themed show.
The singer was found dead in her Beverly Hilton hotel room in February. She drowned in her bathtub after suffering a massive heart attack caused by prolonged drug abuse. PTI CORR JCH
