Ariana Grande pays tribute to Whitney Houston

Watch Ariana Grande sing her heart out as she pays tribute Whitney Houston for the live finale of ABC's 'Greatest Hits.'

Ariana takes on Whitney's classics "How Will I Know" and "Queen of the Night" and smashed them both!

“thank you so much @greatesthitsabc 😌 honored & grateful to have been a part. #howwilliknow #queenofthenight,”