The hallmark moments for "Clouds" singer Zach Sobiech are still rolling in a year after the Stillwater High School grad's death at age 18. His latest honor comes from America's foremost honorarium, the Kennedy Center in Washington, D.C., which will prominently feature a performance of "Clouds" tonight as part of "YouTube Onstage Live From the Kennedy Center."

Other YouTube-generated stars will be stepping up to sing "Clouds" during tonight's webcasted show, including members of Postmodern Jukebox and Playing for Change, along with the Howard University Gospel Choir. Sobiech's girlfriend, Amy Adamle, as well as his A Firm Handshake singing partner Sammy Brown, will also get up and speak about him. John Legend and violin star Lindsey Stirling are among the other performers in the show. You can watch it live via the Kennedy Center's YouTube channel starting at 6:30 p.m. Central Time.

Tonight's tribute follows the recent release of an expanded edition of Sobiech's A Firm Handshake EP, "Fix Me Up," which includes an unreleased acoustic version of "Clouds," the Christmas-timed giant choir singalong version of the song from the Mall of America, a new song from Brown and more. As always, sales of the album benefit as well as Zach Sobiech Osteorcarcoma Fund at Childrens Cancer Research Fund as well as St. Paul-based music org Rock the Cause.