Katy Perry stunned this year's AMAs with a geisha-themed performance in a night that saw country star Taylor Swift named artist of the year.
Singer Katy Perry took a trip to Madagascar in support of UNICEF to help draw attention to the plight of many on the island.
The US pop singer Katy Perry, who is the UK promoting a new film, has said she is enjoying life again after her divorce from Russell Brand.
Justin Bieber, Katy Perry and Eminem are among the artists who have already snapped up gongs at the 2013 MTV Europe Music Awards in Amsterdam.
Miley Cyrus has arrived at the 2013 MTV Europe Music Awards in a backless mini-dress that was an apparent homage to late rappers Tupac and Notorious BIG.
The 19-year-old former Hannah Montana star's dress emblazoned the words 'Please Stop Violence'.
British Songstress Ellie Goulding also flashed some flesh in a black lace Dolce and Gabbana dress, while US singer Katy Perry arrived at the Ziggo Dome in a more demure mint green dress.
US singer Katy Perry has overtaken Justin Bieber as the most followed account on Twitter.
Canadian heartthrob Bieber, on 46,512,835 followers at the time of writing, was edged off top spot at some point today.
Californian Perry, 29, is perhaps best known for her hits I Kissed A Girl, Hot N Cold and Firework as well as her brief marriage to British comedian Russell Brand.
US singer Katy Perry has revealed that Russell Brand told her he was divorcing her in a text message.
The couple split in 2011, just 14 months after getting married in India in 2010.
Perry, 28, told the US edition of Vogue magazine: "Let's just say I haven't heard from him since he texted me saying he was divorcing me December 31 2011".
She also said that Brand, 38, was not comfortable with the singer being his equal.
"I think a lot of times strong men do want an equal, but then they get that equal and they're, like, I can't handle the equalness. He didn't like the atmosphere of me being the boss on tour".
"So that was really hurtful, and it was very controlling, which was upsetting. I felt a lot of responsibility for it ending, but then I found out the real truth, which I can't necessarily disclose", she added.
Usher, Katy Perry and the cast of 'Glee' were among the pop stars booked to mark the start of President Obama's second term.
The official inauguration will take place on Monday, but the celebrations started last night with a Kids' Inaugural Concert for children and military families in Washington DC.
Beyoncé, Kelly Clarkson and James Taylor are expected to sing at the president's official inauguration.
The singer Katy Perry, a prominent supporter of President Obama, has tweeted a picture of her grandmother and herself with the president.