One, two, three o'clock, four o'clock, rock! If you didn't just sing that in your head, you 're lying! The 1950s was the era when rock-and-roll began! Some of the most influential musicians in the world were on top of the charts in the 1950s and that's why this classic rock-and-roll costume necklace is ideal for a party. Think of Ray Charles, Chuck Berry, Jerry Lee Lewis and the one and only Elvis Presley when you put this 50s rock-and-roll theme necklace on! You'll want to sing their tunes all night long!