Whitney Houston's Family quietly celebrated her 50th birthday

Today (Friday) would have been Whitney Houston's 50th birthday, and her sister-in-law, business partner and best friend Pat Houston tells omg! Insider that her family is celebrating it "with peace, love and happiness" at a private dinner at home in Georgia. She says that was one of the diva's favorite ways to celebrate her birthday.

Although Pat Houston calls it "a very emotional time" for the family, she says they will "celebrate the legacy of a matchless gift, Whitney Houston" and asks fans to observe the day with "divine peace, love and joy."