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Rihanna showing side boob in River Island denim clothes

1. Rihanna Shows Off Her Love Of Denim On Instagram

Rihanna shows off her love of denim as she posts a picture of herself wearing some of the clothes from her River Island collection. Picture: Instagram

Jessie J shares a new selfie on Instagram

2. Jessie J Squeezes Her Face For A New Selfie

The 'LaserLight' singer's love of selfies continued this week with several new additions. Picture: Instagram

3. Beyonce Celebrates US Mother's Day With Sister Solange And Mum Tina Knowles

4. Rihanna Returns To The Recording Studio Fresh From Chris Brown Split

"Work hard play hard! @Walemmg and I cooking up a lil treat!!! #studiolife" Picture: Instagram

5. The Rolling Stones Are Joined By Katy Perry On Stage In Las Vegas

Picture: @loveJohnKaty

6. JLS Take Part In A Special Edition Of Deal Or No Deal

"Who’s tuning in to Channel 4 at 8pm Sunday? Watch the boys try and win big for the JLS Foundation! JLSHQ x" Picture: Twitter

7. Dappy Reunites With Tulisa Contostavlos After Feud

#FinallyReunited.." Credit: Instagram

Rihanna poses with Cara Delevingne backstage at a concert

8. Rihanna And Cara Delevingne Meet Up In New York City

"Yup! We definitely have more fun!! #blondelife #backstagebehavior @caradelevingne @georgiamayjagger" Picture: Instagram

PSY and Chris Martin at the MET Gala Ball 2013

9. PSY Meets Coldplay Frontman Chris Martin At The Met Gala In New York

."and her husband chris martin #MetGala" Picture: Twitter

Justin Timberlake and Timbaland in New York

10. Justin Timberlake And Timbaland Prepare For A Show In New York City

"About to DO IT! #NYC" Credit: Instagram

11. Olly Murs Arrives In Las Vegas

"Living the dream..... Loving VEGAS!!! Back to the adult playground for 2 nights!!!! Hangover tomorrow for Shizzle haha" Credit: Instagram

12. Ke$ha Shows Fans Behind The Scenes Of Her 'Crazy Kids' Music Video

"#crazykids #behindthescenes" Credit: Instagram

Madonna and Beyonce pose for a snap at the MET Gala Ball 2013

13. Madonna And Beyonce Hand Out At The MET Gala Ball 2013

The 'Countdown' singer met Madonna and posed for a quick snap. picture: Twitter

14. The Saturdays Star Una Healy Gets Photobombed By A Giraffe

"Say hello Mr Giraffe!" Picture: Instagram

15. Carly Rae Jepsen Shows Off Her New Red Hair Style

"I've always wanted to go red!" Picture: Instagram

16. Example Poses In Front Of A Statue On His Travels

"#Expressionism" Picture: Instagram

Rita Ora shows off her new tattoo on Instagram

17. Rita Ora Reveals Her New Tattoo

The 'R.I.P.' singer had a new design done while out in New York City. Picture: Instagram

Dizzee Rascal shares snap from video shoot

18. Dizzee Rascal Shares A Snap From The Set Of 'Goin' Crazy' Music Video

"#goingcrazy watch it Live now!" Credit: Instagram

19. Rihanna Digs Into A Piece Of Her MAC Lipstick Cake While On Tour

"@mforde11 making me cake" Credit: Instagram

Beyonce and PSY together at the MET Gala Ball 2013

20. Beyonce Hangs Out With PSY At The Met Gala Ball

"Finally talked to @Beyonce about 'Single Ladies' at #MetGala" Picture: Twitter

21. One Direction's Harry Styles Tries His Hand At Being A Hair Stylist

"Giving @M1Jarvis a trim." Credit: Instagram

22. Rihanna Moves On From Chris Brown Split On Night Out With Friends

The 'We Found Love' singer enjoys a night out with her girls after split from the R&B star. Credit: Instagram

Harry Styles with 3D movie crew backstage

23. One Directon's Harry Styles Hints At 3D Movie Completion While Seeing Off Film Crew

"Neil and Mark's last day shooting, really great people. See you soon pals" Credit: Instagram

24. One Direction's Niall Horan Visits Berlin Wall During Germany Visit

"Came to Berlin and seen the wall ! Amazing stuff" Credit: Instagram

Carly Rae Jepsen with The Wanted on tour

25. Carly Rae Jepsen Hangs Out With The Wanted Boys On Their Travels

"Happy Cinco de Drinko with@thewanted boyz @HOT957 :)" Credit: Instagram

Rihanna spends the day with her younger brother

26. Rihanna Enjoys Her "Best Day Ever" With Her Little Brother

"Spent the day with my favorite guy!!!! @rjfenty96 #bestdayever #mylilbroizbigazphuck #whyheposelikehechucknorris #thisniggagotamustache #andabeardthatheshaves" Picture: Instagram

27. Rihanna Hints At Chris Brown Split During Night Out With Friends

"Got a thang for a King, but chu ain't a King!!!" Credit: Instagram

Rihanna cutting a cake on her world tour

28. Rihanna Cuts Off A Slice From Her MAC Lipstick Cake On 'Diamonds' World Tour

"On the road to destruction #cake" Credit: Instagram

Zayn Malik rides a bike during time off from world tour

29. One Direction Star Zayn Malik Enjoys a Bike Ride During Time Off From Tour

"Check out my new bicycle :)x" Picture: Instagram

30. One Direction's Liam Payne Backstage With Their Tour Drummer

"Chillin with Josh Devine :)" Credit: Instagram

Beyonce wearing her dressing gown backstage

31. Beyonce Is Spotted In Her Dressing Gown Backstage On Tour

"Manchester y'all ready! #mrscarterinmanchester" Picture: Instagram

Louis Tomlinson teases big news from the band

32. One Direction's Louis Tomlinson Teases Band's Big Announcement

"Great news coming on your way guys :)" Credit: Instagram

Tom Parker poses with a traditional Mexican hat

33. The Wanted's Tom Parker Gets Into The Spirit Of Things During The Band's Travels

"Happy Cinco de Mayo from our joker Tom!" Picture: Instagram

34. AlunaGeorge Singer Aluna Gets Ready For A Show By Jumping On The Bed

"Ready for the show, jumping on the bed helps to get me in the mood, just checking my COS top is not gonna malfunction! #whyimwearing" Credit: Instagram

George Shelley from Union J makes a new friend

35. Union J's George Shelley Makes Friends With A Pet Dog

"Awww look I made a new friend guys!! George X #HarleyTheDog" Picture: Instagram

Emeli Sande on a beach in Los Angeles from Instagr

36. Emeli Sande Enjoys Some Quiet Time On A Beach In Los Angeles

The 'Next To Me' singer has been enjoying her travels around California. Credit: Instagram

37. Harry Styles Gets Blindfolded During Tour Out In Norway

"I just graduated in Norway." Picture: Instagram

38. Rihanna Presented With Balloons By Friends On 'Diamonds' World Tour

"@og_ella got me flowers and@leleboo_phucku got me these cute ass balloons!! I have the best friends and family!!! I was like an emo lil b***h!! They make me so happy! I couldn't get through this #diamondsworldtour #northamerica without you." Credit: Instagram

Rita Ora tattooing her tattoo artist in New York City

39. Rita Ora Tattoos Her Ink Artist Out In New York City

"And in return @bangbangnyc gets a once in a life time Rita Ora tattoo! #crazy" Picture: Instagram

Rita Ora and Gwen Stefani from Instagram

40. Rita Ora And Gwen Stefani Hang Out At MET Gala Ball 2013

"Sexiest couple. @gwenstefani #alert #metgala" Credit: Instagram

41. Emeli Sande Goes Shoe Shopping Out In Los Angeles

"#solesearching in LA" Credit: Instagram

Disclosure with Eliza Doolittle backstage at a gig

42. Disclosure Hang Out Backstage With Singer Eliza Doolittle

"@elizadoolittle11 and us at rehearsals." Credit: Instagram

Aluna from AlunaGeorge shows off her make-up

43. 'Attracting Flies' Singer Aluna Shows Off Her Make-Up

"The Neon eyes stayed on even though I was raining salt water! #agontour #smashbox" Credit: Instagram

44. Carly Rae Jepsen Poses With Some Of Her Fans Out On The Road

"Met some lovelies in Houston :) xox" Credit: Instagram

Jessie J throws a peace sign while watching The Voice Uk

45. Jessie J Throws Up A Peace Sign While Watching The Voice UK

"@voiceukbbc tonight at 8.35pm! Let the battles commence! AND we will be in different clothes. Woo hoo!" Credit: Instagram

Rihanna wearing denim shorts in New York

46. Rihanna Poses On A Roof Top In New York City

"#iheartny" Picture: Instagram

47. Ellie Goulding Shares Snap Of Her On Charity Run

"Great Nike run with the ladies this morning #weownthenight" Credit: Instagram

Katy Perry eating a hot dog with friends

48. Katy Perry Enjoys A Hotdog In The Sun

The 'Part Of Me' singer enjoyed the sunshine with a friend. Picture: Twitter

49. Conor Maynard Out Driving In Los Angeles

"We cruisin in LAAA" Credit: Instagram

Andy Brown and Niall Horan on a night out

50. Lawson's Andy Brown And One Directon Star Niall Horan On A Night Out

"Me , @niallhoran and @carlfalkmusic" Picture: Instagram

Rihanna's mum shared by the star on Mother's Day

51. Rihanan Shares A Snap Of Her Mum While Celebrating Mother's Day In The US

"Her attitude Rihanna, she got it from her mama!!!.... Happy Mother's Day beautiful!! What a lucky little b***h I am to have come from you! You showed me real strength, how to be independent, how to love and be loved, not to judge people or their situations, how to forgive, how to learn from every mistake I make, how to be hospitable, how to do my makeup, cook, clean, not to lower my standards for anything or anyone! DOLLY taught you so well, I can only imagine how incredibly proud of you she is !!! I am who I am because that's all I've known!! Thank you for all that you've endured to make sure I got here, with a smile!! I could never repay you, you're PRICELESS!!! My gem!!! #mommy #happymothersday #mamasgal #mynumber1" Credit: Instagram