The Girl is Mine 99 Souls Feat. Destiny's Child & Brandy
21 October 2013, 11:32
The 'Kiss You' star professed his love for the 'Roar' singer after watching her sing live at the weekend.
One Direction's Niall Horan has asked Katy Perry to marry him on Twitter.
The 'Best Song Ever' posted the tongue-in-cheek tweet over the weekend after watching the US star perform her single 'Roar' on The X Factor UK live shows.
"I love you @katyperry! Thank you! Ps. Will u marry me?" Niall tweeted.
The pair have enjoyed a flirty friendship over the years stemming from when Katy put Niall through on The X Factor back in 2010.
Check out a picture of Katy Perry during her appearance on Graham Norton last week below (Credit: Getty):
Katy is back in the UK this week as she launches new album 'Prism', fresh from unveiling her next single 'Unconditionally'.
One Direction are out in Australia and New Zealand at present with new single 'Story Of My Life' out on 28th October and their album 'Midnight Memories' following on 25th November.