The Best Celebrity Halloween Costumes of 2023, From Heidi Klum to Paris Hilton

Rapp wore a second Halloween costume for her Brooklyn concert on Oct. 31. This time, she dressed as a throwback version of Justin Bieber. To top it off, she even serenaded "The Summer I Turned Pretty" star Lola Tung on stage with Bieber's "One Less Lonely Girl" hit.