Justin Timberlake Entertains Cannes Partygoers with Songs & Tales of '70s Excess

Justin Timberlake performs on stage at the Brit Awards on February 20, 2013 in London, England.

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Baz Luhrmann's "The Great Gatsby" had tough competition as it opened the Cannes Film Festival Wednesday night: Justin Timberlake.

In an unusual show of support for a film market project, Timberlake co-hosted a bash Wednesday night at the Carlton Beach for foreign buyers to plug Spinning Gold, a biopic of legendary record executive Neil Bogart, who founded Casablanca Records and was closely aligned with the rise of disco.

Timberlake, attending the party with his wife Jessica Biel, will star as Bogart and is producing the film with Foresight CEO Mark Damon, Laurence Mark, Boardwalk Entertainment's Timothy Scott Bogart -- Bogart's son -- and Gary A. Randall.

The disco-themed evening even included Timberlake taking the stage with Timothy Bogart, who wrote the script for Spinning Gold, and Damon, who knew Neil Bogart. Evan Bogart, also son of the late Neil Bogart, is the music supervisor on the film.

Timberlake teased a few of the disco songs that Bogart is best remembered for by singing a line or two, including Donna Summer's "Love to Love You Baby," the 1975 tune that propelled Summer to fame and became an international disco hit. In the song -- known for its erotic lyrics -- Summer simulated being caught in the throes of ecstasy. Bogart convinced Summer to record a second version as long as 20 minutes.

Timberlake quipped that the long version allowed women enough time to satisfy themselves because "women can't have an orgasm in three minutes."

The actor-performer also sang a line from Summer's "Last Dance" and Bill Withers' "Ain't No Sunshine." In between, Timberlake referenced Neil Bogart's partying ways.

"But we're in Cannes, so I don't need to tell you about partying," Timberlake said.