Demi Lovato's tour has been thrown into jeopardy as the singer has fallen sick just days after starting her shows.

The star began her Neon Lights trek in Vancouver, Canada Feb 9, but she has now come down with a mystery illness just a week into the tour, reports contactmusic.com.

Lovato first began suffering symptoms, Friday, writing in posts on Twitter: "No! I just woke up sick! Chicken noodle soup and hot tea please. Baby Jesus I need a miracle! I want to sing tomorrow!"

However, her illness failed to improve over the weekend and she added, "I'm not sure what's worse - chills while taking a hot shower or body aches while laying down."