David Cook performed "Heartbeat", Katherine McPhee performed "Somewhere Over the Rainbow" by Judy Garland, and Sia performed "Cheap Thrills".
There was a special video of some of the characters from the Angry Birds movie auditioning, to promote the upcoming film.
This episode's Twitter hashtags were #Heartbeat, #IdolTop4, #OverTheRainbow, #SiaOnIdol, and #CheapThrills.
Before being eliminated Tristan performed "Independence Day" by Martina McBride.
Adam Lambert performed "Mad World" by Tears For Fears. Later, he performed "Welcome to the Show" with Laleh. Jussie Smollett and Yazz performed "Never Let It Die".
This is the first time outside a finale, where the show opened with a special performance (i.e. not a Group Number).
Only Jennifer critiqued La'Porsha's second performance, as time was running out.
After Dalton's second performance, Harry said they hadn't used the last Save yet, however they just had by saving Sonika and sending Tristan home.
After MacKenzie's second performance, the title card advertising his mom and dad appeared on the screen, but it wasn't showing them.
Before Dalton's second performance his first video started playing, then it showed the crew setting things up on the stage, then went to the proper video.
Actor Morris Chestnut, NASCAR racers Bubba Wallace, and Ryan Blaney, were in the audience tonight.
This episode's Twitter hashtags were #IdolTop6, #EmpireOnIdol, #IdolTop5, #WelcomeToTheShow, and #LambertOnIdol.
Nick Fradiani performed "Get You Home".
Before being eliminated Avalon Young performed "P.Y.T. (Pretty Young Thing) by Michael Jackson, and Lee Jean performed "Let It Be" by The Beatles.
This episode's Twitter hashtags were #IdolTop8, #IdolDuets, #GetYouHome, and #IdolTop6.
Demi Lovato performed "Stone Cold" and Harry Connick, Jr. Ft. Butch Walker performed "I Do Like We Do".
The Group Number this week was "Confident" by Demi Lovato, with Demi Lovato herself. The girls sang with her, while the boys played guitar.