What's better than momentum? Mo' momentum.

Let's take a closer look at five of this past week's biggest scorchers.

Company

March 16 Weekly Gain My Watchlist
Tudou $37.71 145% Add
Frontline (NYSE: FRO) $7.65 45% Add
Guidewire (NYSE: GWRE) $32.31 44% Add
Amarin (Nasdaq: AMRN) $10.52 43% Add
Perfect World (Nasdaq: PWRD) $16.01 35% Add

Source: Barron's.

Tudou was last week's biggest winner, more than doubling as China's leading video-streaming website Youku (NYSE: YOKU) announced it would be acquiring its rival at a 159% premium in an all-stock deal.

Frontline coasted higher after the oil tanker's CEO made some positive comments about the industry's demand.

Guidewire posted better-than-expected quarterly results. The provider of software solutions for property and casualty insurers went public back in January, making this Guidewire's first financial glimpse as a public company.

Investors continue to feel upbeat about Amarin's potentially promising triglyceride-battling drug. AMR101 is currently under FDA review.

Perfect World popped after the online gaming company posted blowout quarterly results and issued a one-time dividend of $2 a share.

More winners for you
It was a great week for these five stocks. If you want to get an early read on some of tomorrow's major gainers, there's a special report on three hidden winners in a booming industry. The report is free -- like this article -- but it won't be around forever, so check it out now.