VOTE: Which Inventor Could Hit It Big?

Which of these four inventors will catch the eye of the infomercial king?

It's one thing to invent a great product; it's another to sell it -- and that's where A.J. Khubani, CEO of Telebrands, comes in.

Click on the image above to watch the inventors make their pitch, and vote on your favorite using the ballot below. Then watch "20/20" tomorrow night at 10 p.m. ET for the results!

With an infomercial empire approaching a billion dollars in value, Khubani knows a thing or two about selling unique products.

"I think one of the first things that makes me like a product is if it makes mesmile," Khubani said. "You know, if it makes me smile, I think it has potential."

"20/20" was given an inside look look at the nerve-wracking process where inventors get just five minutes to try to impress Khubani for the chance to win a contract worth as much as a million dollars.

Watch four inventors make their pitch by clicking above or below. Then use the ballot below to guess who might hit it big with Khubani's help! (Note: The ballot appears after the fourth pitch.)

Watch the full story on 20/20 Friday at 10 p.m. ET.