Time for Viral Video Rewind, our weekly look at the latest, greatest viral videos on the Web.

This week, watch a snowmobiler defy gravity and a young man do a handstand on two fingers - he's said to be one of two people in the world who can pull that off. Then, how to play any instrument brilliantly in a viral video, even if you can't play it at all.

Plus: a cool app to create instant harmony, the ultimate relaxation video, amazingly talented young musicians, and a pop mashup that puts others to shame.

Links to all these videos can be found here. (Or here for a shortcut.)

Have a favorite vid? Post it here or send via Twitter.

Viral Video Rewind comes your way live every Saturday at 3:15 p.m. ET.

Happy Birthday, World Wide Web. Today marks the 25th anniversary of the first dot-com Web page, symbolics.com. Currently, there are more than 80 million dot-com domain names.

We thought we’d take the opportunity to look at other innovations that changed America. Of these three developments, which has had the most enduring impact on your life? You only get to pick one.

1. The building of the interstate highway system.
2. The blanketing of the U.S. with coast-to-coast television.
3. The introduction and spread of the Internet.

Take our quick vote below and leave a comment.
We’ll share the results in the CNN Newsroom 11am ET — 1pm ET.

Of these three developments, which has had the most enduring impact on your life?

• Interstate System
• Television
• Internet

or view results

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A new Pediatrics study suggests that advertisements for Camel cigarettes deliberately or otherwise target teen and college-age girls. The study focuses on an ad campaign for No. 9 cigarettes marketed as “light & luscious” and sport a pink camel on each cigarette. Teenage girls surveyed said the No. 9 ads were their favorite. Advertisements for No. 9s were featured in women’s magazines like Vogue, Glamour, Us Weekly, Cosmopolitan, Marie Claire, and InStyle. R.J. Reynolds says that the company targeted women—but not teen girls.

Our question to you: What influenced you to start smoking?