Grinch's heart grows three sizes after receiving smelly gift

One theme park fan made the Grinch's heart grow three sizes over the weekend.

Universal theme parks vlogger Spokesmayne posted on Twitter a video of his sister presenting an onion to the Grinch at Universal's Islands Of Adventure Grinchmas.

The "How the Grinch Stole Christmas" star -- is getting ready to wreak havoc on Christmas. The lover of all this Grinchy has been known to eat an onion or two. And this onion certainly made his day.

The video, which already has over 14 million views shows Spokesmayne's sister meeting the Grinch and presenting him with the onion-- which makes that grumpy Grinch smile.

He embraces her and marches over to place the onion on the Grinchmas tree-- but not before giving it a sniff and a lick. 

And now you know how to make the Grinch smile-- just gift him an onion.