One Direction is just one week into it's headlining U.S. tour and group member Liam Payne tells MTV News , "It's the biggest show we've done as a band so far, biggest audience for our own tour.  So, it's amazing, absolutely amazing, incredible."

Band mate Louis Tomlinson concurs, "We did the first show [Tuesday and] it was amazing." 

This leg of the U.S. tour is relatively brief, ending in July before a full-scale world tour commences next year.  But the group is planning to leave Directioners -- that's the name the band calls its fans -- with a memento of the current live show.  On Tuesday, One Direction will release Up All Night: The Live Tour , a 73-minute performance DVD shot during the group's U.K. tour earlier this year.  And One Direction hinted at a surprise in store for fans buying the DVD.

On Friday, the band tweeted , "Guess what, Directioners? NEXT WEEK the boys have something very special planned for those of you buying the #UpAllNightDVD 1DHQ x."

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