Pink suspects that Chris Brown was lip-synching when he performed his latest hit, “Turn Up the Music,” at the Billboard Music Awards on Sunday night.

She isn’t shy about sharing her opinion, either.  Pink tweeted during the telecast, “One day if I lip-sync, I hope I do it as well as him....”

Apparently, some people thought she was attacking Katy Perry, who also performed at the ceremony, so on Monday Pink also tweeted “for the record; I luv me some Katy, so y'all can jump off that runaway train, k? I stand behind, always have and always will, LIVE SINGING.”

Joe Jonas seems to agree with Pink. In a possible reference to Chris’ performance, Joe tweeted Sunday night, “What happened to people singing live???”

By the way, ABC’s three-hour broadcast of the Billboard Music Awards averaged 7.4 million viewers, a slight drop from last year’s ceremony.