Yet another reason to tune into the ACMs this coming Sunday, April 3: Country star Darius Rucker will debut a brand-new and very special song called 'Music From the Heart' at the extravaganza. To boot, Rucker will perform the song with 25 of its co-writers.

25 co-writers? Let us explain. The song was collectively written by young adults afflicted with developmental disabilities when they attended the ACM Lifting Lives camp in Nashville over the summer. The camp attendees actually co-wrote the song with Chris Young and Brett James, and will now step onto the stage to perform it with Rucker, which will be a once-in-a-lifetime event for them. James tweaked the original and customized the arrangement specifically for this performance. Young, along with actress/singer Julianne Hough, will introduce Rucker and the 2011 Lifting Lives Music Camp moment to viewers.

"People with disabilities often have rare abilities, and in some cases those abilities involve a special talent or affinity for music," says Rucker in a press release. "I am honored to join ACM Lifting Lives and the Vanderbilt Kennedy Center to highlight how music can better the lives of young people with developmental disabilities on country music’s biggest night."

The performance will also help benefit the Vanderbilt Kennedy Center, which aids in improving the lives of young adults who are developmentally disabled. Viewers will be able to make a $5 donation simply by texting “DREAM” to 27722 or by going here.

The ACMs just keep getting better and better, as everyone who is anyone in the country genre will be on hand and taking part in cool, off-the-beaten path performances. In fact , just last week it was announced that Rihanna would be performing a new song, 'California King Bed,' alongside Sugarland’s Jennifer Nettles.

The ACMs will air live from Las Vegas on CBS on April 3, beginning at 8PM ET.