Say What is your guide into what has been happening in the world of celebrity on social media.

Blink and you'll miss a tweet. Scroll too fast and that all important selfie will never dazzle your eyes. Don't panic, as we have this weekly guide on what your favourite celebrities have been up to on social media. Here is what has been happening this week -

Cheryl Cole changing her hair?

Because she's worth it! Cheryl Cole showed off lighter locks on Instagram. The pop princess, who is rumoured to be rejoining the X-Factor as a judge again, posted, "Do blondes have more fun???!!! I'll let you know ." She is one of those lucky people who suits her hair any colour, we are so jealous!

'Blackout' for Britney

Meanwhile, Cheryl ain't the only one changing her hair as pop diva Britney Spears showed off her darker side on Instagram. The singer appears to have ditched her iconic blonde locks in favour for a more natural brown - and we love it! She did not even refer to the hair colour when she posted the picture as she was in fact trying to promote her new perfume. But let's face it, all everyone was ever going to talk about is her new look. Thoughts?

Paloma loses Faith in hometown?

Poor Paloma Faith tweeted about being mugged this week in London. The singer was inundated with messages of support - and we really hope she is OK!

Superstar DJs - here we go...

With Ultra Music Festival taking place in Miami next month, it is not surprising that most of our favourite DJs spend the start of the year in hibernation in the studio. And this week, Afrojack posted a picture on Instagram of him in the studio with none other than David Guetta. We are dying to know if this is a collaboration - and if it is, we can't wait to hear it!

Girls just wanna have fun

This is one girly night out we would have loved to have been invited too. British TV presenter Cat Deeley posted a picture on her Instagram of her hanging out with actress Anna Kendrick and fashion designer Monique Huillier. She even in claimed in the post it was the best dinner ever, and judging by how much fun they seem to be having...we would have to agree.

Saturday's star Frankie loves Taylor Swift

Frankie from The Saturdays appears to be a Taylor Swift fan. The singer posted a picture of herself on Instagram attending the country star's concert. Swift was playing several dates at the o2 in London as part of her Red tour. Frankie posted, "A bit of Swifty tonight! Not gonna lie I'm feeling 22ooooooo!!!"

Baby Aloud

Nadine Coyle has confirmed she is now 'mammy' to a little girl. The star tweeted to let everyone know she had given birth, and her former bandmates all quickly responded with their congratulations.

Kian swaps his stool for a guitar - sorry we couldn't resist!

King of the jungle for I'm A Celebrity Get Me Out of Here, Kian Egan posted a picture of him on the set of his new music video on Instagram. The former Westlife star is due to release his debut solo effort Home next month, which was written by Chris Daughtry of American band Daughtry. We have to say we are loving this rock look but we still miss the stools, and the Westlife boys all together.

Hello, is it me your looking for?

Fashion designer Stella McCartney posed with signing legend Lionel Ritchie on her Instagram. The daughter of Paul McCartney even cheekily created a collage which features a joke post about his famous hit Hello. You have to hand it to her, she did make us chuckle!


Ozil a magician's assistant?

Arsenal's Mesut Ozil was pictured with magician Dynamo on Instagram this week. We wonder if Ozil is 'assisting' (if you like football, you will get that reference) the magic man with his tricks. Or perhaps it is the other way around with some of the fancy footwork Ozil has shown throughout the years.