Searxng/Hacks HBO Max tv TV Hacks' final season delivers a full-circle moment as Jesse McCartney makes a long-awaited cameo, performing at Ava's birthday party in the new episode. April 29, 2026 AceShowbiz - Hacks has launched its fifth and final season, featuring a special cameo that had been years in the making. This week's episode, titled "Number One Fan," included a memorable appearance by singer and actor Jesse McCartney, who performed during Ava Daniels' birthday party.