The creator of "Hamilton" joined Sting, Justin Timberlake and John Legend for a day of music rehearsals at Hollywood's Dolby Theatre Friday. Lin-Manuel Miranda will become the youngest member of the EGOT club if he takes home the Oscar on Sunday. A novice actress discovered by chance in her hometown of Honolulu, Cravalho repeatedly ran through the tune with a confidence and charm that belie her age and inexperience. The starlet even smiled as she sang, completely undaunted until she noticed Meryl Streep's seat-saving placard in the theater's front row. Legend will perform a newly arranged medley of "City of Stars" and "Audition" by the film's triple-nominated composer, Justin Hurwitz, who kept his sheet music notes under his arm throughout Friday's rehearsal. Set against a backdrop that moves from a Los Angeles sunset to a starry night sky, choreographer Mandy Moore led a team of dancers through a routine that evokes the timeless ballroom moves Emma Stone and Ryan Gosling perform in the film. The stage stars attempted to present the singer with a bottle of water, which she dramatically shunned, until embracing the Tony winners seconds later.