Nick Lachey

Nick Lachey

Nick Lachey wants to get in better shape after landing a new presenting job on VH1.

The 40-year-old singer, who has a 17-month-old son Camden with his wife Vanessa Lachey, is eager to become healthier and recently embarked on a juice cleanse to kickstart his weight loss plan.

He wrote on Twitter today (16.01.14): "2014 is the year of getting healthy!! Time to get the diet right and dive into #crossfit Anybody with me?"

On Monday (13.01.14), the 98 Degrees star revealed he was feeling better after completing a gruelling detox.

He tweeted: "Well, the 5 day juice cleanse is officially over and somehow, i survived!! Thank you @OrchardFlats for cleaning up my 'act'. (sic)"

Nick clearly wants to look his best after inking a deal to replace Carrie Keagan on VH1's pop culture news show 'Big Morning Buzz Live!'

The 'What's Left of Me' hitmaker is set to take over hosting the show this spring.

A source told UsMagazine.com: "It is an open-ended deal. He is very excited!"

The heartthrob, who previously revealed he wanted to raise his son in his native Cincinnati, plans to rent an apartment in New York for his new job.