America's Got Talent is back for one night only tonight on NBC - find out how to watch the holiday spectacular live online.

The America's Got Talent Holiday Spectacular is set to air tonight on NBC from 8-10 p.m. ET/PT. Judges Howie Mandel, Mel B, Heidi Klum and Simon Cowell will all be present during the special, in addition to host Nick Cannon.

"Music, magic and variety acts celebrate the holidays in a stunning special for fans and families to enjoy," says NBC. "Season 11 winner Grace VanderWaal will once again have jaws dropping with a holiday rendition on the ukulele and judge Heidi Klum even joins in on a performance with her Golden Buzzer contestant, Sal Valentinetti. For the first time ever, Professor Splash dives into egg nog and The Regurgitator is using none other than holiday ornaments for his unique performance."

In addition to VanderWaal, Valentinetti, Professor Splash and The Regurgitator, the night features performances by Jackie Evancho, The Clairvoyants, Mat Franco, Piff the Magic Dragon, the Olate Dogs and more.

The series is coming off one of its most successful seasons ever, with VanderWaal receiving nationwide acclaim and attention from her audition onward. Other notable contestants this season included Brian Justin Crum, Jon Dorenbos, Tape face, Laura Bretan, Linkin' Bridge, Solfi Dossi and Viktor Kee.

If you cannot watch the America's Got Talent Holiday Spectacular live on television, you can also do so on NBC's website. If you've "cut the cable cord," though, you can try out Sling TV. This new streaming service has a live stream of NBC in select markets - be sure to see if your area is in one of those select markets.

To live tweet and follow along with others who are watching the America's Got Talent Holiday Spectacular, use hashtag #AGTHolidaySpectacular on Twitter.