Bad Thing was released last week in collaboration with Women's Aid.
The Bad Thing singer said she is "rooting" for her former bandmates and wishes them all success.
The singer gave a 'shout out' to whoever took her mobile.
The star is currently 10th in the Sunday Times Music Rich List - with Sir Paul McCartney in first place.
Jade Thirlwall, Leigh-Anne Pinnock and Perrie Edwards are taking some temporary time away from the girl group.
Nelson left the band last year.
Perrie Edwards says all three remaining Little Mix bandmates 'really needed' therapy together.
'As long as you're not hurting anybody or speaking negative about anybody's race or culture, you should be able to enjoy your body however you want to.'
The former Little Mix star explained her image change.
The former girlband singer said she feels happier working on her own.
The former Little Mix singer has teamed up with Nicki Minaj for her new music.
The singer said it was not being famous that made her unhappy but the pressure of working in a girl group.
Perrie Edwards and Leigh-Anne Pinnock both became parents for the first time in August, within just a few days of each other.
The 'Confetti' singer had a hilarious comeback to Gallagher's inference that Little Mix didn't deserve their Brit Award.
The Little Mix star has surprised fans with her baby news.
Perrie Edwards has given birth just weeks before her Little Mix bandmate Leigh-Anne Pinnock will welcome her first child.
Celebs are always up to something - secret weddings, denying pregnancy rumours or not washing their kids. How much of this week's showbiz goss do you know about?
Simon Cowell's singing competition has been axed after 15 series and 15 winners, but what are the victors up to now?
Jesy Nelson, who left the group last year, was included in the waxwork statues.
The former S Club 7 star said she feels empathy for Jesy Nelson, after she was repeatedly targeted by vile trolls.
The Little Mix star is expecting her first baby soon.
The pregnant singer looks fantastic - but says she feels a little different.
The last thing the group's pregnant stars were expecting was to find out there were more babies on the way.
The singer has signed with Polydor.
Singer Perrie Edwards explained why Mollie King's group didn't get a shout out.