Ariana Grande Sang a Whitney Houston Medley on Greatest Hits


We already knew that Ariana Grande is a musical-impressions whiz with a mean Whitney Houston in her pocket. On Thursday's season finale of ABC's Greatest Hits, however, Grande took a more straightforward-tribute route. She performed a medley of Whitney songs, bringing her signature ponytail to Houston classics "How Will I Know" and "Queen of the Night." Houston, we are "Problem"-free.