The two reality stars looked stunning in black outfits at the function which took place at the MGM Grand Arena in Las Vegas on Sunday, May 17.
Amid the loud cheer, some people could be heard booing the Jenner sisters while Kylie described the rapper as a "great artist, a friend, an inspiration, a brother, and now a doctor," reported Us magazine.
The young stars, however, seemed to be unfazed by the noise as they completed their duty without any mishap.