Meghan Trainor wants out of this narrative! Once again chiming in on the "toxic" mom group drama, the pop star shared a hysterical TikTok on Monday BEGGING fans to believe she had nothing to do with Ashley Tisdale's scandal! While lip-syncing to a scene from Stranger Things, specifically a line by Holly Wheeler, she says: "Come on, you have to believe me! Please, you have to believe me, you have to believe me!" Meghan looked downright distraught as she said it, too! Related: Crystal Kung Minkoff Was ALSO Kicked Out Of Ashley Tisdale's 'Toxic' Mom Group She wrote over the video: "Me still tryin...