A number of former main characters on the show have returned for this two-part episode.
"100" is the twelfth episode of the fifth season of the American musical television series Glee, and the special one-hundreth episode of the show.
Written by series co-creators Ryan Murphy, Brad Falchuk and Ian Brennan, and directed by Paris Barclay, it aired on Fox in the United States on March 18, 2014.
Candice Crawford - whose brother is actor Chace Crawford - shared the news on Tuesday on KTCK 96.7 FM/1310 AM The Ticket.
'We will be expecting our third little Romo offspring this August,' the 30-year-old blonde beauty said during a Valentine's Day broadcast.
Two characters played by special guest stars return as well: April Rhodes (Kristin Chenoweth), who went to Broadway to star in an original musical that won at least one Tony award, and substitute teacher Holly Holliday (Gwyneth Paltrow).
An album, Glee: The Music, Celebrating 100 Episodes was released with thirteen songs on it, featuring music from both this episode and the next one (its second part).
April and Holly, who had been watching from the sidelines, realize how important glee club is to Will and decide to team up to save it.
The show made a list of thirty songs that had previously been performed on the show, and invited fans to vote on which ones should appear in the 100th episode in a promotion called "Gleek's Choice" that was run at the end of November 2013.
Biff then breaks up with Quinn and returns to Yale.
During the diva-off voting, Santana humiliates Rachel, who is consoled by Mercedes.
We feel very honored.'Crawford was Miss Missouri USA in 2008. At the time, Candice was a reporter and anchor at CW33 in Dallas, where she covered high school sports and hosted a daily lifestyle segment.