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LOS ANGELES – Host Conan O’Brien kicked off the 22nd annual MTV Movie Awards ceremony Sunday night with a challenge to gain 50 celebrity cameos for his opening segment, a shtick with Will Arnett that merged two categories – best fight and best kiss – and a musical number about hating musical numbers in big awards shows.

Walking out to a track by rapper Rick Ross, O’Brien joked that he was almost injured by the show’s flashing pyrotechnics.

“Fire, explosions and rap music: all things you associate with Conan O’Brien,” he deadpanned.

Jared Leto presented Mila Kunis the award for best villain for “Oz the Great and Powerful.” “You just made my 12-year-old self dream come true,” said Kunis while holding her golden popcorn prize. “And I just realized that I’m the only woman nominated, and I won.”

Accepting the popcorn prize from Jessica Alba and Rita Ora for best shirtless performance for “That Awkward Moment,” Zac Efron hesitated to take his shirt off on stage until Ora ripped it open. He then finished the job and took it off.

Receiving this year’s Trailblazer Award was Channing Tatum.

The first male to gain the honor after Emma Stone and Emma Watson, Tatum accepted the prize from his “Jupiter Ascending” co-star Kunis and his “22 Jump Street” co-star Jonah Hill.

Tatum admitted he thought he was being punked when he found out he would get the award.

The MTV Movie Awards have become the ideal platform for the Hollywood studios to promote their summer movies.

Ellen Page, one of the stars of the upcoming “X-Men: Days of Future Past,” introduced a clip from the film that sees the X-Men joining forces with their younger selves at Sunday night’s MTV Movie Awards.

In the clip, some X-Men attempt to battle ruthless metal monsters using their special abilities. It’s the first appearance for some of the mutants – Blink, Sunspot, Warpath and Bishop.

An exclusive clip from “The Fault of Our Stars,” starring Shailene Woodley and Ansel Elgort, showed the beginnings of the onscreen couple’s romance in the heartfelt comedy.

Earlier in the evening, Amanda Seyfried had trouble reading the teleprompter, blaming it on not wearing her contacts.

“So far this is going about as well as the Oscars,” said her co-presenter, Seth MacFarlane – referencing his 2013 Academy Award hosting gig – before the pair presented Hill his award for best comedic performance for “The Wolf of Wall Street.”

Hill’s initial thanks went to all of his friends with whom he used to watch the show back home before making it to the ceremony himself.

In the preshow awards, the prize for best cameo performance went to Rihanna for her appearance in the comedy “This Is the End.”

During the show, Rihanna took to the stage with Eminem to perform their hit “The Monster.”

Best kiss went to Emma Roberts, Jennifer Aniston and Will Poulter.

Movie of the year went to “The Hunger Games: Catching Fire.”

The show also featured a special honor to Mark Wahlberg, and a special tribute was planned for Paul Walker, who died in a car crash last November.