Nick Lachey: I haven't spoken to Jessica Simpson in six years

Nick Lachey sat down with Andy Cohen for an episode of "Watch What Happens Live," in which the 98 Degrees singer dished about his ex wife, Jessica Simpson, and even his ex father-in-law, Joe.

"It's been years. Years," Lachey said when Cohen asked how he felt about seeing Jessica on TV. "Honestly, probably six years."

"It was like another lifetime ago," the 39-year-old added. The couple divorced in 2006.

Cohen also asked whether he ever sat down with his new wife, Vanessa Minnillo, to watch reruns of "Newlyweds: Nick and Jessica."

"As you can imagine, that's not popular viewing in my house. We don't sit around as a family and watch the old DVDs," he said.

Lachey was also shockingly candid about his relationship with Simpson's father, Joe, who is rumored to have had an affair with a 21-year-old male model and club promoter.

"The best thing about not having Joe Simpson as a father-in-law -- I don't have to play grab-ass under the table on Easter Sunday," he said.