Jimmy Fallon has hosted The Tonight Show for over 10 years but what he can't believe about his career is that his Holiday Seasoning Christmas album has hit No. 1.
The record is Jimmy's third comedy album and it features a who's-who of music superstars, like the Jonas Brothers, Meghan Trainor, Ariana Grande, 'Weird' Al Yankovic, Dolly Parton and others.
Speaking with Elvis Duran from the Mercedes Benz Interview Lounge at our iHeartRadio Z100 Jingle Ball, Jimmy revealed the most hard-to-get feature on the album was ironically one of his best friends in music.
"Justin Timberlake was the hardest one to get on the album because he was like, 'Jimmy, I have a real music career. I have things going on. You're making your comedy songs. I'm actually going to go on tour.'"
The two ended up having a great time working on the song but Jimmy said Justin was again a last-minute addition for the music video, but he made it in the end.
Check out the full conversation via the player above!