In 2014, Ziegler released her debut album titled Mack Z, which she also used as a stage name for singing appearances. The album peaked at #1 on the iTunes pop charts, as well as #7 on iTunes' albums sales chart across all genres. The music video for the album's lead single, "Girl Party", also reached #1 on the iTunes pop chart. The video of the single has been viewed more than 70 million times. Later that year, her videos for "Shine" and "Christmas All Year Long" premiered. She continued to release singles and videos as Mack Z in 2015 and 2016. In 2014, Ziegler and her sister released a limited edition fashion line, The Maddie & Mackenzie Collection, through Mod Angel.