J-14 was with Big Time Rush when they performed their biggest live show ever at the Mall of America in Bloomington, MN -- there were almost 9,000 people in the audience!
SEE IT: J-14 Hangs with Big Time Rush at the Mall of America
"I think that this is the biggest we have ever performed for," BTR's Carlos Pena said from stage.
Check out this exclusive video of some highlights from their performance, which included the songs "Big Time Rush," "Big Night," and "City is Ours":
What's your favorite Big Time Rush song?
Photos: Courtesy of Emily Krauser