Dozens of YouTube stars will help us announce the Streamy nominees next week, but if you can’t wait to receive your collaborative-YouTuber-bonanza fix, What’s Trending has you covered. The popular online video news program will host the 1st annual Tube-A-Tweet-A-Thon Holiday Spectacular, a 20-hour live streaming charity telethon, and the list of special guests is a who’s who of online video celebs.

iJustine, Epic Meal Time, Daily Grace, Destorm, OlgaKay, GloZell, and Hannah Hart are among the plethora of YouTube notables who will appear at some point during the telethon. What’s Trending will stream the event from their channel starting tonight (December 13th) at 9 PM EST/6 PM PST. We’ve embedded the stream below, so feel free to check back here once the event begins.

The Tube-A-Tweet-A-Thon Holiday Spectacular aims to raise money for the Covenant House charity, which provides homeless shelters for youths all across the US. Viewers can donate by using the #Tubeathon hashtag at any point during the event; for each tweet, event sponsor Virgin Mobile will donate $1 to Covenant House (up to $50,000). Even if you can’t watch the telethon, taking a few seconds to send out a tweet will allow you to make an impact.

The full list of confirmed guests is an exhaustive one. Let’s take a deep breath and go through it together:

Confirmed celebs + performers include Pentatonix (NBC’s Sing Off Season 3 Winners), American Idol’s Pia Toscano and Jared Lee, actress Taryn Manning, Heather McDonald (Chelsea Lately), iJustine (Actress, YouTube Star), Janina Gavankar (True Blood), Doug Benson (comedian), Epic Meal Time (YouTube stars and personalities), John Roberts (Comedian, Bobs Burgers), Bobak Ferdowsi (NASA’s Mohawk guy), Caine Monroy (Caine’s Arcade), Cimorelli, Hannah Hart (YouTube star/ My Drunk Kitchen), Grace Helbig (YouTube star/ DailyGrace), Emma Caulfield (actress), Bella Thorne and Adam Irigoyen (Shake it Up), Destorm (rapper, YouTube star), Shay Carl (YouTube star), Kevin Pereira (Lets Ask America), Alison Haislip (G4 TV), Justin Willman (Nerdist, Cupcake Wars), Olga Kay (YouTube star), GloZell (YouTube star), Shanna Malcolm (YouTube star), Taryn Southern (actress), Austin Brown (musician), Tay Zonday (YouTube star), RealityChangers and many more.

Exhale! If you don’t enjoy at least one person on that list, I guess you’re not much of a TV/YouTube person. For the rest of us, the Tweet-A-Tube-A-Thon is an unmatched example of YouTube collaboration, one with a solid message behind it. Hopefully you’re all able to check out at least a portion of the 20-hour event.