Mack Z is Mackenzie's debut music album, which was released on April 26th, 2014. Her album reached #1 on the iTunes pop chart list in America, as well as reaching #7 on their overall album charts.
Her debut song "It's a Girl Party" was released on April 2, 2014. On April 29, 2014, her music video was released, and shown later that day during the reunion special episode Girl Talk.
↑Under the name “Mack Z,” the 9-year-old released her self-titled debut album over the weekend, and it shot to the top of the iTunes charts! Not only did the album nab the No. 1 position on the pop chart, it also hit No. 7 on the overall album charts.