Nicole Scherzinger and Derek Hough are reportedly "hooking up".

The pair were partnered together and won season 10 of hit TV show Dancing with the Stars in 2010.

Nicole is currently single following the end of her relationship with Formula One racing driver Lewis Hamilton. However, sources close to Derek have revealed the former Pussycat Doll has been growing close to her former TV partner.

The pair have reportedly been "hooking up".

"Ever since Nicole broke up with race-car driver Lewis Hamilton, she's been hanging out with Derek," a friend of the dancer told Life & Style.

"He 100 percent acts like he's her boyfriend."

Derek split from reality TV star Lauren Conrad in early November after a brief three-month romance. The professional dancer and Nicole were spotted enjoying each other's company at the opening of Greystone Manor Supperclub in LA last month.

"He didn't leave Nicole's side," a partygoer revealed.

"Lauren tried her best to avoid him."

It was recently reported that Nicole was seen getting up close and personal with movie producer Christopher Mallick at Hollywood's Roosevelt Hotel.