J-14 hung out with Big Time Rush at the Mall of America in Bloomington, MN, and Carlos Pena was super excited for BTR's big performance. He announced on stage that it was their biggest crowd yet -- almost 9,000 people!
Check out the video below to find out the four things you didn't know about Carlos:
What else would you love to know about Big Time Rush's Carlos Pena?
Photo: Courtesy of Stewart Shining/Nickelodeon