Cheryl Cole and Derek Hough set tongues wagging with flirty Twitter exchange

Cheryl Cole and Derek Hough (pic: Splash)

Cheryl Cole and Derek Hough (pic: Splash)

Cheryl Cole and Derek Hough have fuelled rumours that their romance is back on after an apparentflirty exchange on Twitter.

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The Girls Aloud star set tongues wagging yesterday after posting a mysterious tweet with the words Your sexy.

The unattributed tweet seemed innocent enough until dancer Derek later wrote on his Twitter page with the phrase You are, sparking suggestions he was referring to Cheryl.

The 28-year-old singer has been spending time in LA, where Derek is based, recording her third album, which is due out early next year.

Cheryl Cole Tweet

Derek Hough tweet

The flirty tweetsthat sparked fresh romance rumours

The pair grew very close last year after Cheryls split with love-cheat husband Ashley Cole.

Despite persistent rumours that they were an item, the gorgeous Geordie remained tight-lipped.

During an interview with Piers Morgans Life Stories, Cheryl coyly said: Im not confirming or denying anything.

People can think hes my boyfriend, people can think hes my best friend.

Cheryl Cole and Derek Hough

Cheryl and Derek grew close last year fter her split from Ashley

However, during the interview, she did credit the Dancing with the Stars performer with saving her life when she was struck down with Malaria.

She added: He's an amazing, amazing person... I can never repay him for that (saving my life).

The pair reportedly split in June this year amid claims Derek was unhappy with Cheryl growing close to ex-husband Ashley again.

The flirtation comes just days after Cheryl reportedly vowed to stay single for a while to concentrate on her music.

Cheryl Cole and Derek Hough (pic: Xposurephotos.com)

The pair share an intimate momenton holiday together

A pal said: Too much time was spent worrying whether a certain romance was going to happen. It wasnt worth it. She just wants to focus on putting out the best record yet.

Cheryl also set the rumour mill into overdrive at the weekend when she tweeted her love for hip hop producer Alex Da Kid.

On Saturday, the popstar wrote: @AlexDaKid I love you to which he replied love you to (sic).