The show will honour the late Whitney Houston as the girls perform songs from her discography, while the boys will sing Stevie Wonder hits.
The Top 13 finalists are as follows - DeAndre Brackensick, Hollie Cavanagh, Colton Dixon, Heejun Han, Jermaine Jones, Skylar Laine, Joshua Ledet, Shannon Magraine, Phillip Phillips, Jeremy Rosado, Jessica Sanchez, Elise Testone and Erika Van Pelt.
One finalist will be voted off on Thursday, but join Digital Spy tonight as we live blog throughout the performances.
Jennifer, on the other hand, names Shannon as the finalist that she thinks is in trouble. She defends her choice by telling Shannon and the audience that it was her best performance. Steven also puts Shannon on his "worried" list along with Elise, but it seems that Jessica is his only top choice.
Jennifer stops herself from possibly declaring Hollie as the winner, but she does predict that there might be a "sing off between two girls". We wonder - who could be Hollie's competition?
Randy was sold by Erika, and tells her not to think when she performs. Jennifer admits she got "goosies" but tells Erika she is still "playing it safe". Steven says that Erika was at her best during the chorus. Just like Jermaine, Erika needs to "let it go".