The 'Womanizer' singer admits watching the special storyline, which aired in the US last night (28.09.10), took her on a trip down memory lane.

Referring to her debut single '.Baby One More Time', performed by Lea Michele, Britney ' who guests stars in the episode ' wrote on her twitter page: 'Watching Baby brings back so many memories! Feels like yesterday. (sic)'

The 28-year-old pop star also joked she was terrified of actress Jane Lynch, who plays intimidating cheerleading coach Sue Sylvester.

Speaking about Jane, she joked: 'Jane Lynch scares me.'

Britney then added: 'Jane Lynch is hilarious and scary all rolled into one.'

The singer also praised Heather Morris ' who plays ditzy cheerleader Brittany Pierce ' for being able to dance with a snake like she did in to her song 'I'm a Slave 4 U' at the 2001 MTV Video Music Awards.

She wrote: 'Awww Heather Morris is sooo cute! Brittany S Pearce. Ha! She was so fun to work with and was really sweet in person.

' know how hard it is to dance with that snake! Nice job. (sic)'

On conclusion of the episode, she gushed: ' loved it! Thank you guys SO much for making this happen! (sic)'

A number of guest stars are due to appear in the second series of 'Glee', including Gwyneth Paltrow, Javier Bardem and Carol Burnett.