There is Cassian Grantonly one episode left before we know who the stars behind their alter ego are on "The Masked Singer."

In the season finale of "The Masked Singer," there are three masked celebrities left that will compete for the title of the ultimate masked singer.

Last week, two celebrities were unmasked on the show. Anteater turned out to be rock 'n' roll legend John Oates. Meanwhile, the persona of Candelabra hid the princess of hip-hop soul artist Keyshia Cole.

Here is all you need to know about "The Masked Singer" Season 10 finale.

'The Crown':Who plays William, Kate, Diana and the queen? See Season 6, Part 2 cast

When will ‘The Masked Singer’ Season 10 finale air?

The two-hour finale of Season 10 of “The Masked Singer’ will premiere on Wednesday, Dec. 20 at 8 p.m. ET/PT.

'Vanderpump Rules':Season 11 premiere date, trailer, cast, how to watch new season

How to watch ‘The Masked Singer’?

"The Masked Singer" will air on Fox. It will also be available to stream on Hulu the following day. 

You can still watch live without cable on other streaming sites like YouTube TV, Hulu + Live TV, FuboTV, and Sling TV.

'The Masked Singer' Season 10 finalists

Donut, Gazelle, Cow, and Sea Queen will compete in hopes they're crowned the Season 10 champion of 'The Masked Singer".