\By Gavin Wilson Dec 10, 2010, 20:28 GMT
Nick Lachey donned a set of fake abs as he took on Jersey Shore's The Situation in a workout contest.
The TV host pulled up his tracksuit top to reveal the strap-on six-pack during an appearance on American talk show, Live With Regis & Kelly.
After reality star Mike 'The Situation' Sorrentino revealed his toned stomach, Lachey said: 'I'm not so sure I need to do this.
'It's amazing what you find in your dressing room.'
Host Kelly Ripa joked: 'Nick Lachey, what are you doing with my breast plate?'
The Situation, 28, then showed viewers his workout technique.
Lachey, 37, Jessica Simpson's ex-husband, was co-hosting the episode.
The Situation's new exercise DVD is out now.