MacKenzieheartsu is a rather underrated but rich user on YouTube who joined on December 14, 2006 who has over 2,696,350 views and is mostly referred to by users as a "riched spoiled brat". Her most viewed video is "MacKenzie sells her car for $9.99", which gained over 900,000+ views. Her brother also has a YouTube account, known as "MySisterIsLame".  

MacKenzieheartsu's real name is "MacKenzie". She is known for making a fit over her father getting a red Saab convertible for her birthday, which she wanted a blue one. She later got a blue car from her father, and eventually sold the red car for $9.99 to a woman named Susan. Apparently this was revealed as Dominos was involved with this YouTube account.