Well known entertainment lawyer Charles A. Mathis, Jr. passed away last night of a cardiac arrest. He was 66.

Mr. Mathis had been in a coma for a few weeks, according to industry sources. He was a senior partner of The Mathis Law Firm in Atlanta, and he counted numerous celebrities, professional athletes and executives among his many well-heeled clients, including R&B singers Monica and Usher.

Mr. Mathis was a pillar of the community who donated his time and money to charitable organizations. On the weekends, he unwound with his clients at Atlanta’s top nightclubs.

In 2007, Allison Mathis, pictured above with her dad, Charles, and mom, Cyndi Mathis, celebrated her 16th birthday on MTV’s top rated ‘Super Sweet 16′ program. At the end of the show, Mr. Mathis handed Allison the keys to a brand new Mercedes SUV.

Mr. Mathis’ Buckhead mansion was the location of many legendary industry parties and private events over the years. The palatial mansion was also the scene of “that incident” between Usher and this blogger that made headlines in the NY Daily News.