Katy Perry knows that if you want to turn heads on the red carpet, a sheer dress will do the trick everytime.

The singer showed up to the Los Angeles premiere of Michael Jackson documentary 'This Is It' wearing a black see-through gown that left little to the imagination, particularly from behind.

Another star who was in danger of revealing more than is polite is Paula Abdul, whose bilious cobalt blue dress was whipped up by a gust of wind.

Katy and Paula were among the army of stars, including Jennifer Lopez, Paris Hilton, Berry Gordy and MJ's brothers Tito, Marlon, Randy and Jermaine, who turned out for last night's event.

The occasion proved to a bit too emotional for High School Musical star Ashley Tisdale, who wore a Michael Jackson t-shirt with 'KING' in studded lettering emblazoned on the front.

The starlet was overcome by a teary moment as she posed for photographers.

Get more red carpet action from last night below