On Saturday night Katy Perry attended beau John Mayer's concert at the Hollywood Bowl, and she was joined by her BFF Shannon Woodward, her dad Keith and her sister Angela.

Afterwards John tweeted, "Fantastic show tonight and a great end to this leg of the tour. It was awesome having @Phillips with us. Really looking forward to the fall." Unless Katy plans on going with him to Europe this month, we're guessing she's not looking forward to spending a few weeks apart from him ... Then again, she's so busy promoting her new album Prism, maybe this is perfect timing?