One Direction heartthrob Louis Tomlinson is reportedly 'devastated' over a Twitter campaign by fans aimed at reuniting him with his ex-girlfriend.

The campaign began last week when internet trolls sent Louis' current girlfriend Eleanor Calder photos of him with his ex, Hannah Walker.

The 1D star tweeted to say [uuid=f98c8b29-dc84-4fd2-a0f5-11dc18824249]he was "very p***ed off" by the messages[/uuid] and has now been forced to speak out again.

Fans determined that Louis should break up with Calder and get back together with Walker got 'Louannah' trending on the social-networking site and 140,000 are now following Hannah on Twitter.

Louis is said to be deeply upset by the continuing campaign.

His spokesman told the Daily Mail: "It's upsetting for Louis and Eleanor when Twitter campaigns like this start. I know some of the fans will think it's a bit of fun but it's unnecessary when they are both very happy together."

In response to the campaign Hannah told the paper she "felt terrible" and sent a text to Liam Payne's girlfriend asking her to tell Eleanor "I'm sorry if I've offended her."

Other members of the boyband sensation have encountered similar problems.

It was rumoured that model [uuid=a0b75053-f503-4439-8c5c-ebe08e0b8b1d]Emma Ostilly had "gone into hiding"[/uuid] after she was pictured with Harry Styles, and an [uuid=dd95a74d-7e3f-4f59-99d2-e3e5cd614d61]Aussie receptionist was bullied out of a date[/uuid] with Zayn Malik during 1D's recent promo tour.

[uuid=1a03b39d-f9c5-4cbd-8fe4-dcd493489049]CHECK OUT PICS OF ONE DIRECTION IN MTV'S GALLERY HERE![/uuid]