Get ready to meet the complete opposite of Mr. Schuester when "Glee" Season 4 returns and introduces Cassandra, played by Kate Hudson.

In the new Season 4 promo, Hudson's character heats up the dance floor as NYADA's new dance teacher as she sings what sounds like Jennifer Lopez's "Dance Again."

"I really, really can't stand her," Rachel (Lea Michele) says.

Michele recently told The Huffington Post that Rachel will have some difficulties dealing with her new teacher. "It's going to be a challenge for her, but I think that Rachel definitely works at her best when she has to fight against something, or when she sort of has the odds stacked against her," she said.

"Glee" returns to Fox on Thurs., Sept. 13 at 9 p.m. ET.

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  • "The Untitled Rachel Berry Project"

  • "The Untitled Rachel Berry Project"

  • "The Untitled Rachel Berry Project"

  • "The Untitled Rachel Berry Project"

  • "The Untitled Rachel Berry Project"

  • "Old Dog New Tricks"

  • "Old Dog New Tricks"

  • "Old Dog New Tricks"

  • "Back-Up Plan"

  • "Opening Night"

  • "Opening Night"

  • "Opening Night"

  • "Tested"

  • "Tested"

  • "Bash"

  • "New Directions"

  • "New Directions"

  • "New Directions"

  • "New Directions"

  • "New Directions"

  • "New Directions"

  • "100"

  • "Trio"

  • "Trio"

  • "Frenemies"

  • "Frenemies"

  • "Previously Unaired Christmas"

  • "Puppet Master"

  • "Puppet Master"

  • "Puppet Master"

  • "Puppet Master"

  • "The End Of Twerking"

  • "The End Of Twerking"

  • "The End Of Twerking"

  • "The End Of Twerking"

  • "The End Of Twerking"

  • "The End Of Twerking"

  • "The End Of Twerking"

  • "The End Of Twerking"

  • "The End Of Twerking"

  • "The End Of Twerking"

  • "Glee" Season 5 Cast

  • "A Katy or a Gaga"

  • "A Katy or a Gaga"

  • "A Katy or a Gaga"

  • "A Katy or a Gaga"

  • "A Katy Or A Gaga"

  • "A Katy Or A Gaga"

  • "A Katy Or A Gaga"

  • "A Katy Or A Gaga"

  • "A Katy Or A Gaga"

Earlier on HuffPost: