Stand Up To Cancer Telecast Features Ariana Grande!

Ariana Grande will be just one of many performers in tonight's Stand Up To Cancer telecast!

The 4th biennial Stand Up to Cancer telecast  is taking place tonight, September 5, live from the Dolby Theatre in Los Angeles and will be hosted commericial-free on both broadcast networks and cable channels at 8/7c!

Stand Up To Cancer is an organization that raises money for cancer research that finds new therapies for patients that can save lives and ease the recovery process.

But the Stand Up To Cancer telecast won't be your average phone bank telethon. Instead, celebrities will be taking part in the "We're Calling You" campaign!

Hosted by Katie Couric, celebrities will take time in the digital lounge to contact supporters via social media or over the phone to show their appreciation!

Celebrity participants include Robert Downey Jr., Melissa McCarthy, Steve Carell, Sofia Vergara, Kevin Bacon, Anna Kendrick, Hailee Steinfeld, Josh Gad and many many more!

The telecast will also feature performances by Ariana Grande as well The Who, Jennifer Hudson, Lupe Fiasco, Common and Dave Matthews Band!

If you can't catch the show on television, it will also stream live on both Hulu and Yahoo. There's still time to sign up for "We're Calling You" here!

We love that Ariana Grande is becoming involved in such a great cause! Let us know what you think in the comments below and join our Arianator fan club at Sweety High!