"So… :) @Diane_Warren was asked to write the leading soundtrack song for a new movie called #SilverLining and so @Diane_Warren wrote #crazyboutyou," Jessie J tweeted about the leak.

In the accompanying music video, Jessie J opens by posing on a chair in a skin color leotard with images and lyrics flashing across her.

Daniella Graham by Metro commented "Silver Lining (Crazy 'Bout You) is a simple love song, providing another opportunity for Jessie to showcase her impressive vocal talents.

While not as memorable as some of her most famous efforts, the track will keep Jessie's fan base happy and provides the perfect soundtrack to Silver Linings Playbook".

[1] Katherine Simmons (from BBC) gave the song a positive review stating: "The young diva isn't quite explosive on this song, but even in her softer side she is definitely a strong vocalist who makes this single charming enough to be in the top ten of the UK Singles Chart".