YouTube has announced it's now streaming 4 billion online videos every day, with more than 60 hours of video uploaded to the site every minute. So what's everyone watching?

According to YouTube's own charts, these are the top 20 most-viewed videos of all time. And while Beliebers, Lady Gaga's little monsters and other music fans are well-represented, there's even a random viral video -- 'Charlie Bit My Finger' -- and a video depiction of the proper way to give a thigh massage.

Justin Bieber, 'Baby'

Jennifer Lopez, 'On the Floor'

Lady Gaga, 'Bad Romance'

Shakira, 'Waka Waka (This Time for Africa)'

Eminem, 'Love the Way You Lie'

Charlie Bit My Finger -- Again!

LMFAO, 'Party Rock Anthem'

Eminem, 'Not Afraid'

Don Omar, 'Danza Kudero'

Justin Bieber, 'Never Say Never'

Miley Cyrus, 'Party in the USA'

Katy Perry, 'Firework'

Bruno Mars, 'The Lazy Song'

Thigh Massage Video

Bruno Mars, 'Grenade'

Rihanna, 'What's My Name?'

Pitbull, 'Rain Over Me'

An Experiment

Tootin' Bathtub Baby Cousins

Bruno Mars, 'Just the Way You Are'