And while Harry has tried to remain polite when regards his high-profile ex, his One Direction bandmates have defended him.
Liam Payne, 19, hit out at the blonde singer, claiming her speech thanking the ex who 'inspired' her hit song I Knew You Were Trouble was 'not needed'.
Supportive: Liam Payne defended One Direction bandmate Harry Styles against the latter's ex-girlfriend Taylor Swift
Speaking to Us Weekly at the New York premiere of 1D's film This Is Us, Liam said: 'I just thought it was a bit not needed.
'I mean, you just won an award, it's like, concentrate on yourself.'
When asked if he thought Taylor's behaviour was 'lame', he replied: 'Yeah.'
Making a pop: Taylor Swift thanked an ex-boyfriend for inspiring her as she accept an award at the MTV VMAs on Sunday
This is uncomfortable: Harry starred at the ceiling during Taylor's speech while his bandmates Niall and Louis chuckled about it
Despite having broken up nearly eight months ago, Taylor and Harry's romance was back in the spotlight again after she appeared to refer to their failed relationship in her acceptance speech for Best Female Video.
It is believed Taylor wrote the song with Harry in mind after their first attempt at romance in March 2012, when she was said to be heartbroken when he was pictured kissing American model Emma Ostily in New Zealand a few weeks later.
However, she gave him a second try last November, with the young couple dating for just over two months before splitting in January this year after a row on holiday in the British Virgin Islands.
Awkward: Harry and Taylor ended up partying with their mutual friend Ed Sheeran after the ceremony
When she won an award for the song in question at Sunday's ceremony, Taylor said: 'I also want to thank the person that inspired this song, and he knows exactly who he is, because I got one of these!'
Footage of Taylor at the VMAs also suggest she mouthed the words 'shut the f**k up' as Harry and his bandmates walked on stage to present an award.
Speaking at the New York premiere, another one of Harry's 1D bandmates Louis Tomlinson joked that Taylor wrote the song about Niall Horan.
This is their moment: One Direction were booed when they accepted the Song Of The Summer Award)
He said: 'We were a bit confused. We thought she was actually calling out Niall so the whole thing's a bit confusing.'
Niall added: 'I don't know, she just started writing songs about me...'
Louis added: 'She became obsessed with you, didn't she now?'
Harry then joined in, claiming he had 'had words' with Taylor over Niall: 'I said, you know, she needs to leave him alone.
'I said, "Niall is a nice guy".'
Intense: Taylor stares at her ex-boyfriend as he accepts his award on stage
Liam continued the joke, referring to Kanye West's famous interruption of Taylor's acceptance speech at the 2009 MTV VMAs, adding: 'Hashtag get over it... I was going to do a Kanye! "It's the best video of all time!"'
In an interview with US TV show Extra, Harry played down Taylor's comments, insisting: 'I like a joke as much as the next guy, so it's all good.'
After the show at the Barclays Center in Brooklyn, Harry ended up partying at the same venue with Taylor and their mutual friend Ed Sheeran.
The pair set the Twittersphere alight when the exes appeared in the same photo - separated by Ed and another pal.
Harry explained: 'Yeah, I went for a drink with Ed… and some friends. It was good.'
Fleeting: Taylor and Harry briefly dated from November 2012 until early January 2013