Chris Young, Julianne Hough, surfer Bethany Hamilton and actress AnnaSophia Robb have joined the list of presenters at the ACM Awards on April 3 in Las Vegas. Young's current single, "Tomorrow," is a track from his upcoming album, Neon. Hough won an ACM award for top new artist in 2009 and will star in a remake of Footloose, due in October. A promising young surfer who lost an arm to a shark attack, Hamilton is the inspiration behind an upcoming film, Soul Surfer. Robb portrays her in the movie. Previously announced presenters include actors Robert Pattinson (Twilight) and Reese Witherspoon (Walk the Line), as well as TV personalities Nancy O'Dell and Ryan Seacrest.