Hough, 26, wrote, "'Finally! Welcome to the Twitterverse Dimples ;) @cherylcole"

Derek called Cole 'Dimples' while they dated. Which I'm surprised he got away with.

Derek though is reportedly still in love with Cole. Nowmagazine.co.uk reported, "The singer's former bodyguard Craig Balkam claims that Derek was smitten with Cheryl - but he thinks the feeling wasn't mutual. 'He was definitely in love with her - you could tell from the way he looked at her."

Cheryl is reportedly back with her ex-husband Ashley Cole after she and Derek called it quits.

So how will Cheryl respond to Hough's tweet? (c) tPC