VIDEO: First Look - Watch Lea Salonga Perform on Tonight's CRAZY EX-GIRLFRIEND Season Finale

USA Today has shared an exclusive sneak peek of the CRAZY EX-GIRLFRIEND Season Finale, featuring a performance by Tony Award winner Lea Salonga (Broadway's ALLEGIANCE). The episode airs airs tonight 8pm ET on The CW.

Co-creator and finale director Aline Brosh McKenna explains why Salonga, who has voiced princesses from a variety of cultures, was cast in the episode. "The writers really wanted her," shares McKenna. "Most of the finale takes place at an event that's "a Southern California juxtaposition of a Filipino bride, Arabian Nights-style wedding to a Jewish guy, in a hotel that looks like Versailles."

She goes on to explain that when news of Salonga's casting was announced, "There were actual tears shed in the writers' room. Vinnie (who plays Josh), when he found out, he kind of fell over and fainted." Get a first look below!

In the musical-themed comedy, Rachel Bloom stars as Rebecca Bunch, a successful driven, and possibly crazy young woman who impulsively gives up everything in a desperate attempt to find love and happiness...in suburban West Covina, CA.

Tony nominee Santino Fontana plays Greg, a bartender and Rebecca's (Bloom) first friend. The cast also includes actor and comedian McDonald (MADtv) as Darryl, Rebecca's new boss; OBIE and Drama Desk Award winner Champlin (Broadway productions of Billy Elliot, Sweeney Todd) as Paula, her co-worker at the law firm who is suspicious of Rebecca; and Broadway star Rodriguez III (Here Lies Love) who plays Josh, Rebecca's childhood boyfriend who she serendipitously runs into years later, and who acts as the catalyst for her dramatic life change.