Pink has accused Chris Brown of miming during his performance of 'Turn up the Music' at the Billboard awards .
The singer was not impressed by the younger star's rendition of 'Turn up the Music' at the show last night (20.05.12), as she didn't think he was performing live.
She tweeted: ''One day if I lip-sync, I hope I do it as well as him.''
He tweeted: ''I'm pretty sure I saw my wife did that same performance, but she was 3 months pregnant and actually sang the song (sic).''
Katy had earlier arrived at the awards with her 91-year-old grandmother as her date.
She tweeted: ''My date to tonight's Billboard Music Awards is hotter than the Las Vegas weather. SMOKIN'!(sic).''