Reality TV star and singer Lil' Chris has died aged 24 in his hometown of Lowestoft.
The diminutive pop star, real name Chris Hardman, shot to fame in Channel 4's Rock School after Kiss frontman Gene Simmons made him the lead singer of a student band.
Once the cameras had gone, he was offered a solo deal and went on to have a top five hit with C heckin' It Out in 2006.
Allan Dodgeon, who managed Chris for a year from 2013, said he was in "complete shock".
He said: "He was an outstanding talent and it was a pleasure to work with him. Our thoughts are with his friends and family."
A Suffolk Police spokeswoman said: " Police investigating the sudden death of a man in Lowestoft can confirm they are not treating it as suspicious.
"Officers received a call from the ambulance service on Monday 23 March at around 11:45am and attended an address in Union Road following a sudden death of a 24-year-old man.
"A post mortem examination is due to take place to establish the cause of death and a file will be passed to the coroner in due course and an inquest opened."
Among the famous fans paying tribute were magician Dynamo, who said: " RIP Chris Hardman aka lil Chris :( only 24 years old so sad!"
Caroline Flack, who met the star on children's show TMI, said: " Oh my god . Lil Chris . He was a regular guest on TMI. Always always such a polite lovely guy . That's so sad."
Samaritans deputy chief executive Fiona Malcolm said: " We are saddened to hear of the death of Chris Hardman (aka Lil' Chris) and our thoughts go out to his loved ones.
"If anyone has been affected by this news, or is struggling to cope, we would like to let people know that Samaritans is here for them if they need to talk.
"Samaritans is here round the clock, every single day of the year, to listen and offer confidential support when things are getting to you, by phone on 08457 909090, email firstname.lastname@example.org, or you can find the details of your local branch at www.samaritans.org."