The 22-year-old former One Direction heartthrob - who dumped his fiancee Perrie Edwards by text message in July - has reportedly been actively pursuing married singer Lily, 30, by bombarding her with raunchy pictures and text messages.
A source told The Sun on Sunday newspaper: ''Zayn fancies Lily and has made that very clear.
''He has even sent her X-rated pictures and raunchy texts which Lily has told quite a few people in her close circle about. She's flattered.''
Zayn and Lily have met numerous times, including on a flight to Los Angeles in 2013 and again at the 2014 BRIT Awards, but it is only recently that he has tried to pursue her.
However, Lily has been married to Sam Cooper since 2011 and the couple have two children, Ethel and Marnie.
Meanwhile, Zayn - who is working on a solo career - has been romantically linked to a number of famous women since his split from Perrie.
He was reported to be interested in Kylie Jenner, 18, but she is currently dating rapper Tyga, 25.
Zayn also recently enjoyed a dinner date with Rita Ora and has been seeing Burberry model Neelam Gill.
We spoke to The Corrs' frontwoman about her festive new release.
We want to speak to the Grammys manager...
From child star to rockstar, Taylor Momsen has been through quite the career evolution in her time - and all by the age of 27!
True stories of music and the macabre...
Doja Cat isn't the only one who shocked the world with a new image.
Eight stunning covers of Nine Inch Nails as we welcome them into the Rock and Roll Hall of Fame.
Filmmaker Spurlock (Super Size Me) is known for his investigative wit, but there's none of...
British pop heartthrobs One Direction became a worldwide sensation when they were thrust together on...
Niall Horan, Zayn Malik, Liam Payne, Harry Styles and Louis Tomlinson may make up the...