HOLLYWOOD >> Grammy-winning singer Olivia Newton-John, perhaps best known for her starring role opposite John Travolta in the movie musical “Grease,” will be the grand marshal when the 85th annual Hollywood Christmas Parade makes its way through Tinseltown Sunday. Newton-John will also perform during a pre-parade concert, which will begin at 5 p.m. and feature notables including Cyndi Lauper, Kenny G, Scotty McCreery, War and Eric Benet.