Katy Perry celebrates 25th birthday

Katy Perry celebrated her 25th birthday on Saturday night.

The pop singer, who is rumoured to be moving in with boyfriend Russell Brand, celebrated the occasion by throwing neon paint at her guests, including Taylor Swift and Brand.

According to Radar Online, guests were asked to wear all white at the Charlie And The Chocolate Factory-themed event in Los Angeles.

An insider said: "They got a little crazy with the paint! I wasn't expecting it but everyone got painted - even Taylor Swift!"

Perry and Brand arrived together for the scheduled sit-down dinner.

An insider at the dinner disclosed: "They were totally loved up! Katy was having a ball and Russell was catering to her every whim. At one point, he was down on his knees bowing and offering her a huge swirly lollipop. She grabbed it from his hands and pretended to knight him with it."