Complex sentence: Jimmy says although he liked the songs that became hits for him, and especially liked singing the duets with Frankie Laine and Rosemary Clooney and Gayla Peevey, he never wanted to sing many of the novelty songs that Mitch Miller gave him.
Split into simpler sentences: Jimmy says although he liked the songs that became hits for him, and especially liked singing the duets with Frankie Laine and Rosemary Clooney and Gayla Peevey. He never wanted to sing many of the novelty songs that Mitch Miller gave him.