The 33-year-old singer was thrilled when the 21-year-old One Direction star made a beeline to meet her at the 2015 Billboard Music Awards in May to thank her for writing the band's song 'Tell Me A Lie'.
Kelly said: ''He is so nice. He walked up to me out of nowhere at the Billboard Awards, and no one does that. In pop music people are very like 'too cool for school' most of the time, so I thought he was such a nice gentleman and so kind.''
The 'Breakaway' hitmaker went on to confess that meeting Harry made her feel ''totally old'' as he didn't know who Lestat from the 1994 film 'Interview with the Vampire' was when she referenced him.
Speaking on UK TV show 'This Morning', Kelly said: ''I wrote a song for (One Direction) for their first record so it was really nice because (Harry) came up and thanked me. I did make a reference saying, 'You look like Lestat from 'Interview with the Vampire,' but I don't think he knew! I was like I'm totally old right now! But I told him it was a really great movie...''
Here's what the public had to say about the death of Phil Spector.
Lana Del Rey takes her 60s vintage aesthetic to the extreme with the video for new single 'Chemtrails Over The Country Club'.
As negotiations continue, it's clear that the UK government doesn't have everyone's best interests at heart.
The singer awkwardly responded to potential backlash regarding her new album cover.
Five years ago, on the day of his 69th birthday and two days before his death, David Bowie released his 25th, and final studio album, 'Blackstar'.
Nobody is impressed by Demi "coming to the rescue".
Let's leave gatekeeping in 2020.
These are the albums we're looking forward to most this month.