Former “Tonight Show” host Jay Leno and Washington Nationals all-star outfielder Bryce Harper have been added to the lineup for the Dec. 1 fundraiser at T-Mobile Arena. That battery joins previously announced headliners The Killers, Imagine Dragons, David Copperfield, Boyz II Men , artists from Cirque du Soleil productions (specifically “Mystere” and Blue Man Group) and Penn Teller.
