The two new songs come ahead of the second episode of the HBO drama.
The announcement arrives on the same day as his new single "Popular" with Madonna and Playboi Carti.
"It's important that we got someone like Jennie," the "Earned It" singer said.
"Popular" and previously released single "Double Fantasy," featuring Future, will be featured on The Idol Vol. 1 soundtrack.
The show is set to premiere on HBO on June 4.
"Shows get reshot every day," the singer said of his upcoming HBO music industry drama.
The K-pop star seemed to confirm that a duet with The Weeknd will appear on The Idol's soundtrack.
The Weeknd performed the song for the first time during Metro Boomin's Coachella set.
The guys of 5 Seconds of Summer chatted with Billboard News’ Rania Aniftos to talk through recording their Royal Albert Hall show, working with their musical idols and more. The Weeknd has been teasing his fans all week on social media with clips of him in the studio with Mike Dean for ‘The Idol
The highly-anticipated series will be screened out of competition.
