She arrived in Sydney on Wednesday to promote her new single, I'm Stuck.
He's jetting all over the world to promote his first solo effort, hit single Strip That Down.
But Liam Payne, 23, showed he hadn't forgotten the roots of his musical success as he reunited with One Direction bandmate Niall Horan at the ZPL Birthday Bash concert in Indianapolis on Friday.
Neighbours hottie Olympia Valance confirmed that she's been on a string of secret dates with The One Direction hunk.
The X Factor heartthrob had previously said that promoting his debut solo album Flicker had left him with no time for dating. Olympia, who plays Paige Smith in the Aussie soap, met the Niall down under.
Liam recently posted a sweet snapchat tribute to his little boy on Father's Day and gushed that he 'loved' the necklace he was gifted.
The star has been revelling in new fatherhood since the arrival of the tot and speaking exclusively to Mail Online at the Summertime Ball, Liam revealed his songs have got the seal of approval from his baby son.One Direction shot to fame in 2010 and climbed the top of the charts with pop hits What Makes You Beautiful and Story Of My Life, among others.The pair started their musical careers in the superstar group alongside Harry Styles, Louis Tomlinson and Zayn Malik.You'll start as strangers and as you interact(talk) with them, your relationship will level up to friends, good friends, close friends.The idol can only be your boyfriend upon a successful date.Speaking with KIIS FM's Kyle and Jackie O on Friday, the Make Me (Cry) singer confessed she 'didn't know' if she had a boyfriend but told the hosts she wasn't dating the Irish hearthrob.