Ariana Grande sang two Whitney Houston classics on ABC's live "Greatest Hits" finale.
UPDATE // AUGUST 5: Ariana Grande powered through two iconic hits from Whitney Houston, including “How Will I Know” and “Queen of the Night.”
"honored to be paying homage to my angel tonight," Grande wrote on Instagram ahead of the performance. Watch:
And while we have you... Adam Lambert and Celine Dion also performed on Greatest Hits. Lambert tackled George Michael's "Faith" and Dion was beamed in from Montreal to belt out “My Heart Will Go On.”
EARLIER // JULY 19: