Okay people does not seem to understand this SNSD American thing yet so I'm here to help out.

You guys tell Tiffany to go back to her homeland.
PLOT TWIST! She's born in America! So is Jessica from Girls Generation!
And let's see how much American JB is....0% because he's from Canada!!!
And how about One Direction? 0% there too because they're all from the U.K!
So while your precious JB and 1D doesn't even have 1% of "American" in them/within the group, Girls Generation has! Therefore Girls Generation actually IS more "American" than them! 

And while we're still at it, if you think that YTMA and all other shows hosted in America should be won by AMERICANS you might wanna start nominating and voting for the NATIVE AMERICANS who actually have the RIGHT to call themselves AMERICAN. America is all about multicultural since barely ANYONE is a Native American nowadays. So therefore NO ONE should be hateful about this!

Let's have a look at this (this is taken from a religion-like site counting on the percent of all the different cultures and so on)

• Approximately 42.5 million U.S. residents who self-identify as non-Hispanic white are Catholic, which represents 22 percent of people in the nation of this race and ethnicity.
• Some 29.7 million U.S. residents who self-identify as Hispanic or Latino are estimated to be Catholic, representing about 59 percent of the 50.5 million people of this race and ethnicity in the country. 
• Approximately 3.6 million U.S. residents who self-identify as Asian, Native Hawaiian, or Pacific Islander are estimated to be Catholic, representing about 20 percent of this race and ethnicity in this country. 
• Approximately 2.9 million U.S. residents who self-identify as black, African American, African or Afro-Caribbean are estimated to be Catholic, representing about 8 percent of the 38.9 million people of this race and ethnicity in the U.S.
• Some 535,500 U.S. residents who self-identify as American Indian or Alaskan Native are estimated to be Catholic, representing about 18 percent of the 2.9 million people of this race and ethnicity in this country.

Do I need to say more?

Rant over.