Lea Michele & Amber Riley: 'Glee' 100th Spoiler - Mercedes & Rachel Have a Diva-Off

SPOILER ALERT! DO NOT CONTINUE IF YOU DON’T WANT TO KNOW WHAT HAPPENED!

Lea Michele and Amber Riley keep the carpet hot as they arrive for the Glee 100th episode celebration held at Chateau Marmont on Tuesday night (March 18) in Los Angeles.

Who else saw the showdown between Rachel and Mercedes on tonight’s episode? If you didn’t, you missed something!

Here’s what went down: The girls were determined to find out who’s at the top of the most successful Diva, so they had a showdown in front of the club, with “Defying Gravity.” But before a vote could even start, Santana started to humilate Rachel in front of everyone! Mean!

Later on, Mercedes and Rachel came to terms with some internal battles and decided they didn’t care who won. Good thing too, since the vote was 50-50.

FYI: Lea is wearing a Milly dress with Brian Atwood shoes.

15+ pics inside of Lea, Amber and Chris…