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

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 -

Mariah hangs with Monroe

Mariah Carey posted this adorable picture with her daughter Monroe on her Instagram. The superstar was spending quality time with her daughter amidst rumours she and hubby Nick Cannon are heading to the divorce courts.

Back on?

Justin Bieber and Selena Gomez look cosy in this picture posted on Instagram. The possible on-again couple reportedly went on a trip to Justin's hometown of Ontario in Canada. Is it baby love all over again for the pair?

New beau?

Calvin Harris seems to have put is split with singer Rita Ora behind him as he poses with this brunette beauty on his official Instagram. Model Aarika Wolf stars the DJ's new music video for latest single blame and he has been joking about their status. In another post, he said: "Prom date or music video? With @aarikagerette." We can't wait to see that video now.

Happy birthday Michael

Paris Hilton shared a throwback picture with fans to wish singer Michael Jackson a happy birthday. The socialite posted this snap and said: "Happy birthday Michael Jackson! Love & miss you lots. You will always be special to me & close to my heart. I will never forget this day being on set with you for your music video. Thinking of you on your birthday. Love always Paris." The music legend would have been 56 today, happy birthday Michael!

Guess who?

From one throwback photo to another, can you guess the singer? It is none other than Chris Brown. The singer posted this picture on Instagram of his younger self. His new studio album X is out on September 16.

I work out

TOWIE star Lauren Pope shows how she keeps her svelte figure in tip top condition. The reality TV star posted this picture of herself on Instagram heading out for a morning jog. Doesn't she look fantastic? We are well jel, we never look that good exercising.

Video star

Jessie J has been busting moves ahead of filming the video for her new single. The singer, who performed at the MTV Music Awards this week with Ariana Grande and Nicki Minaj on their collaboration Bang Bang, posted this picture on her Instagram with her backing dancers. She said: "WHAT A DAY! Learning choreography for my next video I shoot tomorrow in LA! These girls and guy are amazing! Imma tag ya'll tomorrow I said ya'll lol." Jessie is expected to release her third studio album Sweet Talker on October 10. The star also released the video for Bang Bang this week which you can watch here -

Burger demands

Miley Cyrus doesn't ask for much when it comes to eating the good old fashioned American classic - the burger. The star posted a picture of herself on Instagram enjoying a burger and said: "There is nothing more beautiful than eating a meat free gluten free dairy free cheeseburger in the sunset." Does look tasty though.

Like mother, like daughter?

Looks like musical talents runs in the family. Myleene Klass and her daughter Ava posted an adorable picture of them playing the piano together. Myleene said: "Always wanted to (do) this with my babies. #duet!" Not bad work for a seven-year-old!

Oh the glamorous!

Model Alexa Chung caught up with Elementary star Lucy Liu at the Emmy's after parties this week. How glamorous are these girls?