Is Justin Bieber's 'Boyfriend' video too hot for tweens?
Other pop stars like Miley Cyrus and Britney Spears have tried to transition from sweet and innocent to a more provocative look and sound -- some with more success than others.
"All those Beliebers have to grow up sometime," Spencer surmises.
So is 18-year-old Bieber one of the ones who can easily make the move from "sweet little Justin Bieber," as Spencer calls him, to sexy, whisper-rapping Justin Bieber? And is it different because he's a guy? Does it make the transition easier?
What do you think?