The 43 year-old singer also sported a pair of long black gloves, a gleaming silver necklace and some diamond sparkling earing to match with the dress, reported Contactmusic.
Carey, who sang while sat on top of a grand piano, was impersonating the cartoon character Jessica Rabbit from the 1988 comedy 'Who Framed Roger Rabbit'.
Jennifer Hudson and Smoky Robinson also performed at the annual event.
Other Stars in the entertainment business such as Aretha Franklin, Motown founder Berry Gordy, Tamar Braxton and Janelle Monae were also in attendance at the show.
The BET Honors are a celebration of African-American individual's efforts and contributions to the arts, literature, music and film industry.