Taylor wasn't being immature when she was giving her speech, she was being ironic, she does that on Ellen too, she's a person who can laugh at her mistakes and about the guys she dated, but not in a bad way, just get a sense of humour people!
Yeah, at least she can just laugh off those things~ and i dont think either that she immature on that! Well, if i made a song and it won an award then it about my ex, i’ll slry be thanking my ex for breaking my heart! Hahahahaha. Like, how can u not?