It's been more than 20 months since Evanescence performed onstage ... but on Monday (August 8), that will all change, when the band takes over the MTV airwaves to premiere their brand-new single, "What You Want," live from Nashville.

The show begins at precisely 7:54 p.m. ET/PT, with an extended interview and Q&A session with the band to follow on MTV.com ... and if you think you're excited, well, then you can imagine how Evanescence must be feeling. After all, this moment has been a long time coming.

"We are so ready for Monday!" frontwoman Amy Lee said in a statement to MTV News. "I'm really excited to finally share this thing with our fans. We can't wait!"

Tweet your question for Evanescence to @mtvnews and tag it #EVMTV!

Immediately following their return to the stage, the action will shift over to MTV.com, where Lee and Co. will sit down for an in-depth interview about "What You Want" and their upcoming, self-titled album (due October 11). During that time, they'll also be answering questions from fans worldwide. You can send your questions to the band via Twitter using the hashtag #EVMTV, and we'll read some of the best during the live stream.

It's sure to be a big night, and why not? After all, it's been 20 months in the making and, for any Evanescence fan, it's sure to be an event they won't forget anytime soon. We're calling it "MTV First: Evanescence," and it all begins tonight at 7:54 p.m. ET/PT. Make sure to tune in and sound off using the hashtag #EVMTV.