Single and mingling!

Just three weeks after splitting with girlfriend Jessica Biel, Justin Timberlake was spotted at an L.A. club getting cozy with freshly divorced Olivia Wilde on April 2. 

"We are just friends and have been for years," tweeted the 27-year-old House star, who filed for divorce from husband of eight years Tao Ruspoli in February.  

Still witnesses at the Roxbury had quite a different take on Timberlake, 30, and Wilde's evening. 

"They were obviously on a date," says one insider. "They were dancing and whispering. He had his hand on her back and shoulder and they were together all night."

Adds another, "They were in a group, but not talking to anyone else. They were flirting a lot!" 

Get all the details of Olivia and Justin's night out, as well as Taylor Swift's first date with Tron Legacy star Garrett Hedlund from Us Weekly Senior editor Ian drew and singer Melanie Fiona