Billy Ray: I'd twerk like Miley
Miley tweeted the message her dad apparently sent: "'Mile, if twerkin woulda been invented....And I had a foam finger....I woulda done the same thang you did.' - DAD"
Meanwhile her pal Kelly Osbourne has joined the chorus of celebrities criticising the raunchy performance.
On her E! show Fashion Police, where her co-presenters gave Miley's antics a thumbs down, she said: "I look at the performance and, yes, I do have a lot of the same opinions as you guys about it.
"Miley's my friend and I love her, and I have her back no matter what, but, as her friend, I'm going to tell her - 'Put your tongue in your mouth! I love you, but just put your tongue in your mouth.'
"We're not talking about her performance, we're talking about what she's wearing. It's not that original [the bikini] but I do appreciate it's reminiscent of the Blurred Lines music video."