Ariana Grande performs mash-up of Justin Bieber's "What Do You Mean?" and Justin loved it!

Ariana Grande was on her "Honeymoon Tour" in Houston when she performed a mash-up of Justin Bieber's "What Do You Mean?".

When Justin Bieber saw the video, he twitted, "@ArianaGrande saw the mashup. Loved it. Thanks,” .

Of course Justin will be impressed as both of them are under the same management run by Scooter Braun.

Nevertheless, who are probably mostly Justin fans, loved it!