Celebrities at Teen Choice Awards

Jessica Simpson

'Pirates of the Caribbean: Dead Man's Chest' has picked up a host of awards at the Teen Choice Awards.

The swashbuckling Disney film walked away with seven awards, including best action adventure and best actor for Johnny Depp.

The crowd at Los Angeles' Gibson Amphitheatre went wild when co-stars Orlando Bloom and Johnny Depp turned up to collect the prizes.

However, the awards were not all plain sailing for the winners. Nick Lachey said bumping into ex-wife Jessica Simpson was "awkward".

The former 98 Degrees frontman was at last night's event (Aug.20), which was hosted by Jessica, to accept the Best Love Song award for his hit 'What's Left of Me'.

As he picked up his prize, a fan in the audience yelled: "Take that, Jessica."

The bigger surprise, however, came in the form of pregnant presenter Spears, who wore a cleavage-baring dress, and introduced her "man" onstage with a shout and a giggle.

"This show has been very good to me and my career over the years. And I'm hoping that it will be as good to our next performer," she said.

In a loose white shirt and white hat, Federline prowled and jumped around the stage, surrounded by young dancers.

Reese Witherspoon, who won best actress in a drama for her role in "Walk the Line," said backstage that her surfboard-shaped green and yellow award was going to her daughter.

"I love the younger fans," said Witherspoon, who spent the summer hanging out with her kids.

Keanu Reeves and Sandra Bullock, who won for best movie liplock for their long smooch in "The Lake House," joked backstage about their first respective kisses.