High atop Los Angeles on Thursday, Variety toasted up-and-comers in show business and music as part of its annual Power of Young Hollywood cover franchise. The class of 2024 included hitmaker Sabrina Carpenter, “SNL” breakout Marcello Hernández and “Stranger Things” supernova Sadie Sink.  The Santa Monica Proper hotel’s rooftop was transformed into a bubblegum confection […]