"I'm a Believer" is the definitive song about skepticism turned into joy. It captures the exact moment a cynical heart is unlocked by love at first sight.

"Then I saw her face, now I'm a believer
Not a trace of doubt in my mind"

Unlike many love songs that focus on heartbreak or longing, this track celebrates the sheer, undeniable energy of finding connection. It's a testament to how quickly one's worldview can shift from gray to technicolor.

Released in 1966, this hit was actually penned by Neil Diamond before he became a superstar in his own right. The Monkees, initially created for a TV show, proved their musical chops with this infectious recording.

The song became the biggest selling record of 1967 in the US and one of the few singles to sell over 10 million physical copies worldwide.

It topped the Billboard Hot 100 for 7 weeks. But its legacy extends far beyond the 60s.

• Shrek Revival The song found a massive new audience in 2001 when covered by Smash Mouth for the movie Shrek, introducing it to a new generation.
• Gold Standard It remains the quintessential example of "Sunshine Pop," defining the happy, harmonious sound of mid-60s radio.

Driven by a catchy organ riff and propelled by energetic drumming, the song is relentless in its optimism. Micky Dolenz's lead vocal is perfect for the track—energetic, slightly raspy, and full of conviction.

The "call and response" backing vocals ("I'm a Believer!") invite listeners to sing along, creating an instant sense of community.

From "I thought love was only true in fairy tales" to the triumphant chorus, every line is a pop cultural touchstone.