'The X Factor' 2012 winner was banned from singing their songs on the show because his mentor Nicole Scherzinger thought viewers wouldn't have heard of them, but the band have now struck up a friendship with the singer.
Frontman Josh Franceschi told the Daily Star newspaper: ''I got to know James because he has the same vocal coach as me.
''Me and our drummer Dan Flint were out with James and some other X Factor singers one night. A few of them are You Me At Six fans too.
''They'd really wanted to do one of our songs. However the producers won't allow rock songs to be performed unless it's by famous bands like AC/DC.''
The band - also made up of Max Helyer, Chris Miller, Matt Barnes and Dan Flint - say there's no hard feelings and they are heading for number one this weekend with their fourth studio album 'Cavalier Youth'.
The lads are also preparing to head out on tour in March and claim they've curbed their partying ways.
Josh said: ''When we started we literally drank our way around the world thinking it was our duty to down all the free alcohol put in front of us.
''But the bands who last are those who are able to develop business heads.
''We realise it's not fair to fans who've saved up for tickets if I'm too wasted to jump around for 300 gigs a year. If we have a day off, we'll party.''
Josh insists they are not as angry as they used to be and their next album is the more positive than previous offerings.
He explained: ''It's going to be great to throw my body around to the new songs, even though my back is f***ed.
''We started out at the same time as Paramore, and we'd love it if this album made us as successful as they are.''
Sia gets a string of Hollywood stars involved in her latest music video, a festive number entitled 'Santa's Coming For Us' from her newly released...
A startling new video has been unveiled by Alt-J to go with their newest single 'Pleader'.
Green Day have long been known for having political undertones in their music, and their new song 'Back In The USA' is no different.
The film is almost half an hour longer than 'The Force Awakens'.
The film is expected to continue without Mendes' involvement.