The `America`s Got Talent` host - who was transferred to a Los Angeles hospital after falling ill with "mild kidney failure" on 04.01.12 while holidaying in Aspen, Colorado with wife Mariah Carey and their eight-month-old twins Moroccan and Monroe, tweeted a picture of himself getting a haircut with the words "gettingback to business".
Meanwhile, Mariah also took to twitter to inform fans of Nick`s condition and revealed he hopes to leave hospital with two days.
She wrote: "Thank you everyone for all the love & concern. Nick is in stable condition with a good prognosis, hopefully he`ll be discharged within 2 days. As always he`s laughing and in good spirits (sic)."
The `Fantasy` hitmaker revealed Nick had been taken ill on her twitter page on Wednesday and asked fans to pray for her "brave" spouse.
She tweeted: "Please pray for Nick as he`s fighting to recover from a mild kidney failure. #mybraveman (sic)."