Internet service provider (ISP) Sky has extended its Happily Ever After broadband campaign by inviting consumers to conjure up their own fairytale ending on micro-blogging site Twitter.

The broadband provider is urging the nation to create alternative conclusions to a number of famous fables in 140 characters or fewer via Twitter or the Sky competition website.

Pop star Sophie Ellis-Bextor is backing the campaign - she will be Tweeting her own fairytale endings in the coming weeks and will select the winning entrant.

The Murder on the Dancefloor diva, who has two young children, commented: "To help keep us in touch with our inner child, I'm helping to launch the Happily Ever After competition through my Twitter site.

"I'm encouraging my followers and others to submit their alternative endings to fairytales that they enjoyed as children."

Sky's latest cross-media advertising campaign has been ongoing all this month, with characters including the Giant from Jack and the Beanstalk, Little Red Riding Hood, the Wolf and the Frog Prince helping to promote the ISP's broadband deals.