43 people you forgot guest-starred on 'Glee'

• "Glee" premiered on Fox in May 2009 and lasted for six seasons. 
• The award-winning series featured appearances from plenty of notable stars, including Tyra Banks, Neil Patrick Harris, Demi Lovato, and Britney Spears. 
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"Glee" premiered on Fox in May 2009 and introduced fans to rising stars like Lea Michele, Cory Monteith, and Chris Colfer.

Throughout the show's six-season duration, lots of notable stars appeared. Singers like Britney Spears, Demi Lovato, and Josh Groban had guest-starring roles on "Glee." Other actors, like John Stamos and Gwyneth Paltrow, also popped up on the series. 

Here are 41 people you probably forgot appeared on "Glee."

SEE ALSO: 57 celebrities you forgot guest-starred on 'How I Met Your Mother'

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Jeff Goldblum guest-starred as Hiram Berry, one of Rachel's fathers.

He appeared on season three after hearing about Rachel and Finn's engagement.

"Fam" star Brian Stokes Mitchell played Rachel's other dad, LeRoy Berry.

Rachel's dads pretended to be supportive of her engagement. 

Demi Lovato guest-starred as a waitress named Dani on season five.

She worked a the Spotlight Diner in New York City with Rachel, Santana, and Kurt. Lovato performed an acoustic rendition of The Beatles' "Here Comes the Sun" with Naya Rivera's Santana during her first appearance on "Glee."