ContactMusic — Bruno Mars has been spotted partying with Rihanna to celebrate her 24th birthday Katy Perry and Chris Martin were also said to have been in attendance at the Barbados-themed Beverly Hills party according to Mtv The party reportedly featured a Caribbe... more info

Topix — Katy Perry 's song "Part of Me" soared to the top of the iTunes charts after she performed it on the Grammys on Sunday night, and that's great news for a good cause. more info

ContactMusic — Pop star Katy Perry is donating the proceeds from her new single Part Of Me to an arts charity The I Kissed a Girl hitmakers latest song shot into the top 10 on iTunes just hours after she debuted it at the Grammy Awards on Sunday 12Feb12 Perry... more info

ContactMusic — Katy Perry is donating proceeds from her new single to charity The 27-year-old singer will give the profits from download sales of her current track Part of Me to the MusiCares organisation which provides financial medical and personal assistance... more info

MTV.co.uk News — Rihanna reportedly held a pre-birthday party on Monday (13th February), where the likes of BFF Katy Perry, Bruno Mars and Chris Martin were all in attendance.The We Found Love singer, who turns 24... more info

Pop Crunch — Oh Riri….. It appears as though Rihanna’s 24th birthday bash included appearances by her BFF, Katy Perry, fellow Grammy-nominees, Bruno Mars, and Cold play’s Chris Martin….and former boyfriend, Chris Brown. [...] more info

Gigwise — Including Adele, Katy Perry... more info

Pop Candy — The young singers in the PS22 Chorus have tackled songs by everyone from Tori Amos to The Jackson 5 to Katy Perry with enthusiasm and talent ... more info

ContactMusic — Pop stars Katy Perry Bruno Mars and Chris Martin helped Rihanna celebrate her birthday one week early during a Barbados-themed bash on Monday 13Feb12 The Umbrella hitmaker doesnt officially turn 24 until next week 20Feb12 but she got the party start.... more info

Starpulse — Katy Perry's lost her husband... but at least she gets to keep her cat. The "I Kissed a Girl" songstress and her soon-to-be ex recently worked out a custody agreement for Krusty the Cat, the kitty ... more info