As fans of The Beatles celebrate the 50th anniversary of the band invading America with their mop-topped hair and infectiously catchy melodies, we decided to take a deeper dive into their impressive discography.

Over the decades, the Fab Four's songs have been unpacked and analyzed and accused of everything under the sun — far too many times to count. You can't talk about "Lucy in the Sky With Diamonds" without someone mentioning the LSD.

See also: A History of the Beatles in 50 Photographs

We called on our biggest Beatlemaniacs to debunk and decipher some of the references and hidden gems peppered throughout the years. Take a look and a listen.

23 Hidden References in The Beatles Songs