Nick Lachey made a much-anticipated appearance on MTV's "Total Request Live" this afternoon with current squeeze Vanessa Minnillo co-hosting, and the chemistry was crackling -- between Nick and co-host Damien Fahey, that is.

Despite the fact that the two were just laying it on one another thick and heavy at New York's Butter nightclub the other night, Nick and Vanessa barely looked at each other during Lachey's appearance on the show, and no physical contact between the two was noted even when Vanessa passed just in front of Nick on the way to look out the window. What's more, their one moment of banter, when Minnillo made the observation that Nick is "everywhere," inspired a deeply awkward response from Nick.

Indeed, Nick, who was premiering his new video, left Vanessa (and the audience) wanting, much as he did Monday afternoon at a Manhattan restaurant, when, despite her best efforts, she couldn't get Nick to give her a kiss.