Justin Bieber Attorney and 'Real Housewife' Lea Black Double Up On Star Island Mansion Sale

Roy Black -- the powerhouse attorney who handled Justin Bieber's Miami DUI case -- is about to score a sweet deal for his Miami mansion.

Roy and his wife, ex 'Real Housewives of Miami' star Lea Black, just listed their palace on Star Island for $18 million -- an impressive price, considering they paid $7.5 million for it just 4 years ago.

The home was recently renovated and is huge -- 10,000 sq ft with 7 bedrooms and 7 baths, plus a guest house with 3 more rooms and 2 bathrooms.

Lea and Roy have options for a new primary residence -- they have another home in Miami, one in the Florida Keys, and one in L.A.