It is said that death travel;s in 3s .. this week alone Chuck Brown and Donna Summers have both died. In an era where music has developing and changing rapidly. These both music greats set the pace with their creative lyrics and orginal style. Disco legend Donna Summer died Thursday at age 63, reportedly after a battle with breast cancer. The Washington, D.C. funk band leader and composer, whose biggest hit was the 1978 song “Bustin’ Loose,” died Wednesday at Johns Hopkins University in Baltimore at age 75. TMZ was the first to report the Summers death, and the site reports that she was…