Big Time Rush has played some pretty amazing gigs. Not only did they spend the entire summer touring the country, but they had a huge performance in Mexico with Justin Bieber (yes, we said Justin Bieber) and they've officially played at the White House twice! Now we know why 'Big Time' is a part of their name. But what was it like belting out their tunes on such a high profile stage? Kendall Schmidt has the deets.