A free concert featuring Julianne Hough, Kellie Pickler and LeAnn Rimes will highlight a series of activities leading up to the 44th annual Academy of Country Music Awards show in Las Vegas. The three vocalists will be featured in a concert billed as Divas Downtown taking place April 4 on Fremont Street. Other events announced Thursday (Feb. 19) include the New Artists Show, another free concert set for April 3 on Fremont Street. Toby Keith and Montgomery Gentry are scheduled to participate in the ACM Chairman's Ride, a charity motorcycle ride, on April 4. The same day, Rascal Flatts will host the sixth annual ACM Celebrity Golf Classic. Reba McEntire hosts the awards show on April 5 at the MGM Grand Garden Arena. On April 6, George Strait will be honored as the ACM's Artist of the Decade during a musical tribute being taped to air on CBS. A list of performers will be announced soon.