Is now known and Miyavi, since he left the VK /Jrock group, Due' le Quartz. He is known to be very egotistical and narcissistic, which is rumoured to be one of the reasons he left the band. For more info, go to Miyavi.
From the Card Captor Sakura English manga, "phwee" is the romanized version of the sound she makes ("Hoeeeeee..." {pronounced like ho-eeeee}). It's supposed to show surprise or confusion.
Tomoyo: Ah, spring! The time a man's fancy turns to love!
Sakura: Phwee?