This combination of file photos shows from left to right, Tituss Burgess, Ashley Park and Adam Lambert. The entertainers are performing in TikToks crowdsourced Ratatouille musical. (AP Photo)NEW YORK – TikTok’s crowdsourced “Ratatouille” musical has cooked up some serious talent for its one-night-only benefit concert, including roles for Tituss Burgess, Adam Lambert, André De Shields and Ashley Park. “Ratatouille: The TikTok Musical” — fondly nicknamed the “Ratatousical” — will begin streaming on Friday at 7 p.m. Burgess will play Remy, Lambert plays his older brother, Emile, and Brady plays his father.