阿曼達-塞弗裡德演唱並演奏揚琴，稱薩布麗娜-卡本特應加入《媽媽咪呀！3》劇組3》劇組 (Amanda Seyfried Sings & Plays the Dulcimer, Says Sabrina Carpenter Should Join the Mamma Mia! 3 Cast)