:No. If the band Big Bang was on the article name Big Bang, then in only that case we would need a hatnote at the top linking to Big Bang (disambiguation). But that's not where this article is. This article is on Big Bang (band), so we don't need a link to Big Bang (disambiguation). Articles only have these hatnotes on them because, for example, if someone types in "obama" in the search box, they might be looking for the city or the holiday. But here, most people would that are looking for the band would type in "big bang" in the search box, see the Big Bang (disambiguation) on the top of Big Bang and from there go here. No one in their right mind would type in "Big Bang (band)" while searching for the theory or the TV show. So that's why we don't need it. As for the band's single and album, that's why we had the original direct hatnote link from here to the single article and album article. People going here looking for the single or album shouldn't have to go to Big Bang (disambiguation), where there are hordes of other songs and albums titled "Big Bang". Virtually no one coming from the article Big Bang (band) would be looking for the album titled Big Bang by, say, Los Enanitos Verdes. Colloquially, no one coming from this article would be looking for the song "Big Bang" by Bad Religion.