Jared Leto: Guns N' Roses Concert!

Jared Leto arrives at the Guns N’ Roses concert held at The Forum on Wednesday (December 21) in Los Angeles.

Earlier this month, the 39-year-old rocker and his band, 30 Seconds to Mars, celebrated their Guinness World Record for “Longest Concert Tour by a Rock Band.”

“I used to love the [Guinness] Book, you know, world’s fattest twins or world’s longest fingernails, and so it’s fun to think we’re a part of something that was a part of our childhood,” Jared told MTV News.

“Plus, it’s Mars history, and something fun for us to do and another chance for us to stop, take note, say thank you to the people that have shared the journey and helped to take our dreams and make them reality,” he added.