Ariana Grande

Ariana Grande is one of the biggest pop artists of her generation, a Grammy winner whose four-octave range carried her from Broadway and Nickelodeon to record-breaking albums and to the role of Glinda in the Wicked films. She is also a lifelong, unapologetic Harry Potter devotee. Her early social feeds read like a fan diary of rereads and house sortings, and her standing advice to followers was simple: when in doubt, start the series again.