The pop star's special Glee episode may not air until Tuesday, but PEOPLE.com has a sneak peek – and it's wild.
Heather Morris, who plays Brittany (different spelling) on the Fox musical comedy, writhes around with the same kind of albino snake Spears got cozy with during her infamous 2001 MTV Video Music Award performance of "I'm a Slave 4 U."
The tune is featured in the episode, as is "Toxic," which PEOPLE.com debuted earlier.
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