Zedd, Selena Gomez

Zedd's "I Want You To Know" featuring Selena Gomez kicked off his incredible True Colors album. And while Selena appeared in the song's music video, she's never really performed it live with the superstar DJ/producer ... UNTIL NOW. Zedd brought out Selena during his set at iHeartRadio Jingle Ball hosted by Z100.

Zedd put together an awesome set for his iHeartRadio Jingle Ball performance at Madison Square Garden, where he just recently played during his "True Colors Tour." He played his hits like "Beautiful Now," "Break Free," "Stay The Night," and others. But he closed out his set with "I Want You To Know," and brought out Selena to help him close out the performance. Yup! That's right. ZEDDLENA REUNITED.

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Selena sauntered out on to the stage in front of the DJ booth looking FLAWLESS in a black lace dress with gold undergarments sparking from underneath, along with a flannel shirt tied around her waste, and FIERCE thigh-high boots to top it off. 😍

Selena GomezPhoto: Getty Images

Can I please be Selena Gomez when I grow up? 

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Check out Zedd's full iHeartRadio Jingle Ball set list below:

1. "Beautiful Now"
2. "Rude (Zedd Remix)"
3. "Break Free"
4. "Stay The Night"
5. "Clarity"
6. "I Want You To Know"

And watch a clip of Zeddlena's performance right here:

If you missed out on all the action, consider this your holiday gift. You'll be able to relive the night on The CW during a special 90-minute broadcast on December 25th and 30th at 8 p.m. ET/PT -- so put on your Santa hats, grab some gingerbread cookies, and tune in!