“This is It” is documentary depicting the late pop icon Michael Jackson’s rehearsal for his would-be London concert performances premiered Tuesday night in downtown Los Angeles.

A red-carpet premiere ceremony was held before the screening. Celebrities donning smart costumes filed into Nokia Theater, the premiere live music and concert destination in the heart of Los Angeles, along a red carpet.

People from home and abroad, many of them holding high the late pop singer’s posters, waited impatiently for their turns to go inside.

A number of fans, dressing like Michael Jackson’s  hat, suit,T-shirts and a pair of silver gloves, posed in front of a big screen showing videos of his performances.

The atmosphere was totally different from then the Memorial service. Everybody seemed high-spirited and so eager to watch the 112-minute feature-length film as if they were going to a live pop concert.

Tickets authorities said a total of 6,000 tickets had already been sold out across the United States. The film will be shown from Wednesday in 75 countries and regions for a limited two-week run.

Will Smith caught on camera impersonating Michael Jackson.  He is well dressed in classic cardigan and relaxed boot cut jeans.

Cordin Bleu from High School Musical, all grown up. Cordin wearing a shiny suit that plays off the metallic trend that went strong in womens wear  in the Spring 2009 season.

Brenda Song from TV show ” Suite Life of Zack and Cody” is wearing sequinced style jacket, tiger oversized T shirt, leggins and sexy boots.

Paula Abdul from American Idol wearing an electric empire dress with a slit in the front, peach stiletto. Remember Paula Abdul was the Jacksons dance choreographer.

Jennifer Lopez arrives looking  sexy with an edge.

Jennifer Love Hewitt wearing a Michael Jackson T-shirt and very hot boots! Let’s take a closer look,

Paris Hilton black dress with gold safety pins that exposed much Paris Hilton admirable figure was an iconic frock.

Vivica Fox looks flirty and fabulous wearing this black asymmetrical one shoulder strap with silver coloring on the side.

It seems most celebs were wearing black.  Daisy Fuentes wearing harem skirt with blouse.  The fringe styled boots didn’t match the outfit and the skull scarf, oh no! Maybe the skulls represent Michael Jackson video “Thriller”.

Roselyn Sanchez arrives wearing all black dress, black clutch bag and sexy stiletto boots.  Love this but too much black for the day, add some color.

Berry Gordy arrives, what’s up with that tie, too much going on.

Courtney Mazza and Mario Lopez at “This is It” Premiere.  Courtney’s dress is in a brilliant teal dress, with a thick high black belt and black boots. Mario sexy cool look black shirt, jacket, jeans and sneakers were pulled together fashionably.

Katy Perry wearing a long see through dress ( similar to a flamenco dancer) Adam Lambert looks great with black jacket, leather skinny tie and fitted pants.

Kenny Ortega producer of the movie.

Fashion editor : Anissa Rochester

pictures provided by WireImage