While many have theorized that “KTT2” stands for “kanye​tothe 2”, this claim is false. On the forum kanye​tothe.com, the community became known as “KTT”, removing the original context of the site’s dedication to artist Kanye West. Thus, as “KTT2” only references the KTT community, KTT2 has no relation to artist Kanye West, but rather, the community cultivated on KTT, along with various new users. KTT2 is not a Kanye fansite by any means.

UPDATE:
Through mathematical prowess, the team has concluded that “ktt2” actually stands for “Charli XCX”. Here is the explanation:

k is kilo or 1,000 in the Metric System
X is 10 in Roman Numerals
C is 100 in Roman Numerals
XCX stands for “Kiss Charli Kiss”

Therefore, “Charli XCX” can expand to “Charli Kiss Charli Kiss”, or “CXCX”.

“ktt2” can be interpreted as “k to the 2”, which translates to k^2.
k = 1,000 = 100*10 = C*X

Therefore, k^2 = (C*X)^2, which can be expanded to (C*X)*(C*X), or just CXCX. And we’ve already covered that “CXCX” means “Charli XCX”; therefore, “ktt2” means “Charli XCX”.