1. Paul was a trumpet player.

Yep. At the age of fourteen, he received a trumpet as a gift from his father, who at the time was a jazz musician. It was not long after that when Paul decided to trade it in for a guitar... and the rest is history.

2. Paul played a role in the development of the Cat Scan.

If not for Paul and The Beatle's success, the C.T. Scan would probably not be around. How you ask? Simple. Paul and The Beatles were signed under EMI Records. EMI Records also owned a computer research facility that happened to be run by Godfrey Hounsfield. He was involved with x-ray computerized tomography at the time. Because The Beatles brought in so much money to EMI, they were able to invest in Hounsfield's new technology, thus the C.T. Scan as we know it was born. Thanks Beatles!

3. McCartney accidentally grew cannabis on his Scotland farm.

In 1973, Paul had received some seemingly random seeds in a fan letter. Curious what they would grow to be he planted them only to be fined 100 pounds after police discovered the plants were cannabis which was illegal at the time.

4. Paul was baptized Catholic.

Paul and his brother, Michael, were baptized per his mother's request. His father was a protestant turned agnostic, but his mother was Catholic. So for all you Catholics out there, Paul technically is one of you! (and yes, this is the Pope with Paul's face)

5. His song, "Yesterday," is the most covered song in popular music history.

With the amount of officially recorded covers totaling at over 2,200, Paul has captured the hearts of musicians near and far. Also, the song's original working title was "Scrambled Eggs" and the opening line read: scrambled eggs, honey how I love your legs.

6. Paul starred in the musical, "Give My Regards to Broad Street."

In 1984, McCartney wrote, directed and produced his own musical feature film. Not only did McCartney star in his own musical, but he also brought Ringo in for a guest appearance. The musical covers a fictional day in the life of Paul and Linda McCartney. As a whole, the musical movie was considered a box office failure, but the soundtrack sold well.

7. McCartney witnessed 9/11.

Yes, you read that correctly. Paul McCartney witnessed 9/11 right as it was happening from a plane he was on flying over New York City. Paul recalled in an interview, “Out of the window on the right hand side of the airplane, you could see the Twin Towers. First there was a plume of smoke and then there was a second. I said that’s an optical illusion. It’s probably just some sort of little fire. Finally the steward came over to me and said, ‘Look, something serious has happened in New York and we’ve got to get you out of here.'” The plane was immediately grounded at the nearest location and all were evacuated safely. McCartney said that the first thing he did as soon as he got off the plane was that he headed to the nearest bar and got himself a drink while watching the rest of the attack unfold. Wondering how he could help in any way, he decided to put a concert in honor of all of those who served during the attacks and those who lost their lives. These horrific events inspired his song, "Freedom." Months later, Paul unveiled his Concert for New York, which included many famous musicians such as, David Bowie, The Who, Billy Joel, and Adam Sandler who performed a humorous medley covering the events of 9/11. After the concert, Paul was made an honorary detective for the NYPD.