So there's no number of tweets/hashtags under both #OrangeCarpetDay and #NHRAonFox, like there are on the following three topics.
This leads me to believe those are the trending topics specifically for this Twitter account, based on the accounts (likely a lot of UT and NHRA fans/bloggers/outlets/whatever) this account is following. #OrangeCarpetDay is NOT trending nationally.
Just clarifying for those less Twitter-savvy