This is why you should pay attention in math class and never stop watching what the teacher is doing even for a second.

100 Years of Beauty in 1 Minute. Time lapse of a model getting her hair and makeup done to match every decade from 1910 to 2010.

NBC Nightly News anchor Brian Williams raps Snoop Dogg's classic, Who Am I (What's My Name)?

Czech National Symphony Orchestra plays the Ghostbusters theme song at the Prague Proms festival.

Heavy Metal Cats Music Video. Rock On.

2 year old girl recites her ABC's while listening to heavy metal music.