11/10/2011 06:41 pm ET Updated Jan 10, 2012

Adele Mash Up For 300th Performance On 'Glee'; Naya Rivera & Amber Riley Perform

Ever since we found out that Mercedes and Santana were going to sing a diva-licious Adele mashup in the upcoming 'Mash Off' episode of 'Glee,' we've been impatiently waiting to see the real thing. Thankfully, the wait is over.

CORRECTION: This story formerly said it was the 300th episode of 'Glee.' We have corrected this to accurately state that it is the 300th performance on the show.

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