A lawsuit filed this week claims Dean McKillen and Cuesta Estate, the builders of Beyonce and Jay-Z‘s $88-million Bel Air mansion, skipped paying Qwest Engineering for over $200,000 worth of work on the house before it was sold to the superstar couple. According to TMZ, Qwest claims McKillen and Cuesta asked them to do all the excavating on the house and carve…

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