Female Singers : Riffs and Runs Beyonce Runs and Riffs Ariana Grande Riffs and Runs Christina Aguilera Ruffs and Runs Demi Lovato Runs and Riffs Mariah Carey Riffs and Runs Whitney Houston Riffs and Runs Celine Dion Riffs and Runs Jessie J Riffs and Runs Jazmine Sullivan Riffs and Runs Brandy Riffs and Runs Best Vocals High Notes