Chris Brown performed at Sunday night's Billboard Music Awards and whilst the R&B singer seems to be able to do no wrong in the eyes of his fans, his fellow pop stars in the audience were less than impressed with his performance. Brown didn't seem to be able to muster up the energy, or the coordination, perhaps, to sing live and it wasn't long before the likes of Pink called him out for lip-syncing his way through the act.

On her Twitter feed, Pink posted a message after Brown had performed his hot song 'Turn Up the Music,' saying "One day if I lipsync i hope i do it as well as him..." The hi-energy act involved Chris riding glow in the dark bikes, on a giant ramp onstage. He seemed to have forgotten that the evening was a music celebration, not a motocross awards event, but he carried on regardless, miming his way through the elaborate routine. Pink's husband, Carey Hart - himself a motorcycle racer - couldn't quite stifle his own opinions on the performance, either. He remarked on the similarities between a Chris; stage show and a Pink's performance at the 2010 American Music Awards saying "I'm pretty sure I saw my wife did that same performance, but she was 3 months pregnant and actually sang the song."

Unfortunately for Carey, some of Katy Perry's fans got the wrong end of the stick and thought that he was calling her out, rather than Chris Brown. He cleared up the confusion but still managed to get a dig in at Perry whilst he was at it, after writing a message that said ""Looks like someone else's fans got a bit wound up! Funny, that performance looked real familiar too."