In the second episode of "Euphoria" season three, Sydney Sweeney lounges poolside in skin-tight pants and a Barbie-pink crop top, eyes bugging out of her skull. She's in character as the beautiful and desperate Cassie Howard, trying to convince her best-friend-turned-romantic-rival, Maddy Perez (Alexa Demie), to propel her to internet stardom. "I just feel like if more people knew me, I would be huge," Cassie proclaims with childlike pride. When Maddy observes that "the market is oversaturated