Stay Zedd feat. Alessia Cara
There's an American theme running through our best pictures this week due to President Obama's Inauguration ceremony with Katy Perry, Beyonce and Kelly Clarkson all included!
Amid speculation he has reunited with former flame Rihanna, Chris Brown was photographed this week out having a fun night at Bootsy Bellows, and was joined by a mystery blonde. Picture: Splash
The female X Factor judges wore elegant gowns for the award ceremony at London's O2 Arena.
The 'Skyfall' singer, who recently won a Grammy Award for her James Bond theme, stopped by a baby boutique in West Hollywood with her bodyguard. Picture: Splash
The former Pussy Cat Doll Nicole Scherzinger was promoting her new single 'Boomerang' out in London wearing a large pair of black shades.
Jay-Z and wife Beyonce arrive at the ceremonial swearing-in for President Barack Obama at the U.S. Capitol during the 57th Presidential Inauguration.
Taylor Swift arrives in London for a much rumoured reunion with ex-boyfriend Harry Styles this week. Picture: Flynet
RiRi was out and about in West Hollywood with a new longer hairstyle and bright red lipstick. Picture: Splash
Beyonce, who has long been a supporter of President Obama, performed the American National Anthem during the US President's ceremonial inauguration.
One Direction star Harry Styles leaves a house in North London in the middle of this week's snowy weather.
The 'Daylight' singer was pictured in a foil hat and sporting a YOLO sign as he filmed scenes for a promo in Los Angeles. Picture: PacificCoastNews
Couple of the moment Katy Perry and John Mayer arrive at the Inauguration ceremony for President Obama's second term at the US capital in Washington.
Harry Styles was pictured driving his Range Rover in North London, which apparently cost him £15,000 to insure.
Lady Gaga has a late night at Shamrock Tattoo Parlour, but is yet to confirm where on her body her new tattoo is and what it's of. Picture: Splash
BFFs Rita Ora and supermodel Cara Delevingne leave the Groucho Club in London holding hands. Picture: Flynet
Lady Gaga was rumoured to be shopping for gifts for Elton John's new baby Elijah dressed in a big, colorful dress with a white floppy hat and a black Hermes bag. Picture: Splash
BFFs Rita Ora and Cara Delevingne stand together at the Chanel Haute Couture fashion show. Picture: Goff Photos
Katy Perry dresses in an American themed outfit to perform songs including 'Firework' and 'Teenage Dream' during the children's concert in Washington to celebrate military families.
The singer was performing at the Philips Arena in Atlanta, suspended above the stage in an all white suit, dark glasses and silver angel wings.
The 'Just Dance' star heads to the Staples Center ahead of her show in Los Angeles for her current world tour. Picture: Splash
The singer explored the French capital city in a bright pink jumper, black hat and Adidas sweatpants. Picture: INF.Photos
Alicia Keys performs 'Girl On Fire', changing the lyrics to 'Obama's on Fire' during the Public Inaugural Ball in Washington.
American Idol Winner Kelly Clarkson sang 'My Country 'Tis Of Thee' for the President, his family and the crowd.
The Girls Aloud member performed the iconic song 'One Day I'll Fly Away' on stage during the National Television Awards at the O2 Arena in a floor length gown.
Ke$ha, who performed hits including 'Die Young' and 'Tik Tok' in front of the President and crowd, said she was "proud to be American" at the ceremony.
The X Factor UK judge posed in a sheer black dress with her hair in a high ponytail at a recent photo shoot. Picture: Simon Wisbey
The 'Scream and Shout' star attended the Inaugural Ball at the Walter E. Washington Convention Center.
Usher wears a bright red pair of high-tops to perform at the 2013 Kids' Inaugural Concert to celebrate President Obama's next four years.
Rita Ora was spotted arriving back from Paris at King's Cross St Pancras station, sporting a fluffy hooded coat and dark sunglasses.
The 'Shina Ya Light' singer attended the Chanel Spring/Summer 2013 Haute-Couture show this week, supporting supermodel friend Cara Delevingne.
The 'Scream' singer stands on the field before the NFL football NFC Championship game.
Ellie Goulding, sporting a short pink tinted hairstyle, leaves the 'Good Morning America' studio in NYC with her boyfriend, War Horse star Jeremy Irvine. Picture: Splash
The singer makes a hand gesture when leaving filming for 'The Daily Show with Jon Stewart' at The Daily Show studios.
The X Factor Judge joined thousands of teenagers to launch the National Citizen's Service at KOKO in Camden, encouraging young people to build skills for work and life and boost their job chances.
The No Doubt frontwoman was pictured picking up her children from school in between her duties as one of the world's biggest pop stars.
A pink haired Amelia Lily sticks her tongue out for photographers while out in London.
One Direction member Liam dresses in a smart shirt to attend the pre-Brit awards dinner in London
Niall, Zayn, Harry, Louis and Liam were joined by comedian and actor James Corden to watch Arsenal play. Picture: Xposure
Oritse Williams strikes a pose for the red carpet at the Raymond Weil pre-Brit Awards dinner in London.
The couple embrace on the red carpet before the dinner, held in London.
X Factor winner James Arthur attends the Raymond Weil pre-Brit Awards dinner in London.
The 'Trouble' star wore a short white dress at the 40 Principales Awards.
The 'Girl On Fire' singer treated her Spanish fans to a performance at the Los 40 Principales Awards in Madrid.
Rihanna leaves little to the imagination as she leaves a club in LA. Picture: Splash
There’s enough food in the world for everyone, but not everyone gets enough food. We can be the generation to stop hunger, join the IF Campaign: www.enoughfoodif.org “ Picture: Rankin