YouTube's most-watched videos of the week

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Refreshingly few vloggers appear in this week's YouTube top ten. Instead, the ranking is dominated by the new Twilight trailer release, a tennis charity match gone bad, and Chat Roulette's new improv star.

1) THE TWILIGHT SAGA: ECLIPSE - Trailer - The trailer for the upcoming sequel of the vampire saga tops the list. 9,255,514 views.

2) THE TWILIGHT SAGA: ECLIPSE - Trailer :10 Preview - A shorter version of the teaser just reveals one string of the plot, dealing with Bella's dilemma of having to choose between Edward and Jacob. 5,407,015 views.

3) Things Get Ugly Between Two Legends At Charity Event "Agassi/Sampras" - A charity tennis match reveals the personal rivalry between Andre Agassi and Pete Sampras. 2,284,399 views.

4) Chat Roulette Funny Piano Improv #1 - Your host, Merton, freestyling in real-time with random strangers on Chat Roulette. 2,797,729 views.

5) Jay Park-Nothing on you (cover) - This YouTuber is surprising viewers with his voice and ability to making his cover sound very close to the original song. 2,392,413 views.

6) OH MY GOSH!! - The dangers of treadmills, cupstacking, and psychic drawing on Ray William Johnson. 2,224,401 views.

7) Annoying Orange: Luck o' the Irish - Orange celebrates St Patrick's Day in his very on way. 1,860,329 views.

8) Lady Gaga & Beyoncé Telephone Video Premiere - A teaser for the most popular music video of the month. 1,837,904 views.

9) MBB: Gerard Anderson and Ray Miller Combine for the Sequence of the Day - College basketball highlights from the MBB Big West Conference. 1,710,381 views.

9) Singing Fail - This girl, performing on a Chinese TV show, involuntarily reveals she's singing playback by holding the microphone upside down. 1,619,876 views.