It's simple.  Take a favorite song, book or movie title, and replace one word with "spam". Because spam can ruin anything. (As per the title above, Beatles songs are especially suitable.)

Baby You Can Drive My Spam

Norwegian Spam

Can't Buy Me Spam

Sgt. Pepper's Lonely Hearts Club Spam

A Hard Day's Spam

Here Comes the Spam

I'll Follow the Spam

Lucy in the Sky with Spam

The Ballad of Spam and Yoko

You've Got to Hide Your Spam Away

Old Brown Spam

All You Need is Spam

Carry That Spam

Maxwell's Silver Spammer

I Am the Spamrus 

I'm Happy Just to Spam With You 

The Long and Winding Spam 

Magical Mystery Spam 

Beatles Solo Careers

Paul:  Spam on the Run

John:  Give Spam a Chance

George:  While My Spam Gently Weeps

Ringo:  You're Sixteen, You're Beautiful and You're Spam 

The Bridge On the River Spam

War and Spam

It's a Spam, Spam, Spam, Spam World 

A Midsummer Night's Spam

Spamarillo By Morning 

The Wizard of Spam

Spam With the Wind

Eat, Pray, Spam

The Swiss Spamily Robinson

Papa Was  a Rolling Spam 

The Maltese Spam

Chariots of Spam

The Spam Connection

Attack of the Fifty Foot Spam 

A Spam for All Seasons

Spam the Torpedoes!

The Three Faces of Spam 

A Fistful of Spam

As a Man Spammeth

Spambake! 

A Spam Under the Influence

Spamming Arizona 

Night of the Living Spam 

 Spamton Abbey

Spamway to Heaven 

Atlas Spammed 

Lord, I Was Born a Spamblin' Man 

Spams of New York

The Good, The Spam and The Ugly 

Village of the Spammed 

The Spam Menagerie 

Spam 9 From Outer Space 

Who's That Spam (Spamming Around with You)?

Spam Up and Jelly Tight

Sheena Is a Punk Spammer 

God Save the Spam

Spam Is On My Side 

Seven Spams for Seven Brothers 

Far From the Spamming Crowd

Spam Yankees

Spambaya 

Honky Tonk Spam 

A Spam of One's Own 

The Silence of the Spams 

Spambi 

Green Eggs and Spam 

The Spam on the Floss 

Spam and Spammability (a two-fer!)

Wuthering Spam

Charlotte's Spam

Middlespam

The House of Spam

2001 A Spam Odyssey

The Day the Spam Stood Still

It's a Wonderful Spam

Spam!  (this covers a lot of territory) 

Spamzilla

The Bride of Spam

Scratch My Spam

A Spamcycle Built For Two

My Spam Will Go On 

How Green Was My Spam

Heart of Spamness

The Great Spamsby

Special John Steinbeck Section: 

The Spam of Wrath

In Dubious Spam

Of Mice and Spam 

 Travels With Spam

Spam of Eden

Spammery Row 

OK, you get the picture. Come up with your own besties in comments.