The ceremony Friday at the Shrine Auditorium, which honored diversity in the arts, was punctuated by moving tributes to Whitney Houston, the Black Stuntmen’s Association and George Lucas and the Tuskegee Airmen. Yolanda Adams sang the spiritual song “I Love the Lord, He Heard My Cry” as part of a moving tribute to Houston, who died last week at the age of 48. “We love you, Nip,” she said as she finished the song, referring to Houston’s nickname. Footage of Houston accepting the award for outstanding female artist in 1994 was shown, as was Denzel Washington’s presentation of that award, in which he called the singer an “artist of unparalleled stature.” Samuel L. Jackson presented Lucas with the Vanguard Award. The