The New Age of Pop: Justin Bieber and Lady Gaga

An odder pop couple doesn't exist: Justin Bieber with his heartthrob looks and Mayberry sweetness, and Lady Gaga with her outrageous costumes and kinky persona.

And yet behold the king and queen of today's music video scene, taking over for MTV-era monarchs Michael Jackson and Madonna.

At their torrid mouse-click pace — in September, Bieber was getting 3.7 million views a day, Gaga 1.8