Music
The former American Idol star admitted that the pair's busy schedules meant that they were unable to record together on her new LP Battlefield.
"I love Leona. We made a pact to duet together but my record was already finished," she told the Daily Star.
She added: "I'm hoping I can get on her next album."
The star has previously expressed her desire to work with Lewis, claiming that the pair could be the new "Mariah and Whitney".
> Sparks: 'Writing Battefield was therapeutic'
Singles Reviews
Matt Cardle: 'Amazing' reviewCould Matt Cardle's stock finally be on the rise?
The Sound
Ones to watch: LawsonDigital Spy finds out more about the fast-rising group.
Music Interviews
StooShe interview: 'We're not a girl group'Digital Spy talks to Stooshe about the Spice Girls, All Saints and debut album.
Album Reviews
The Ting Tings: 'Sounds From Nowheresville' reviewThe duo overcomplicate matters on their second studio album.
