According to PEOPLE, Mahone is in the hospital being treated for a blood clot, extreme inflammation in his throat, and severe dehydration. He is expected to recover, but the tour is unlikely to happen until 2014, as he's on "strict doctor's orders to stay on rest."
On Thursday, Michele Mahone posted a picture of her son on a hospital bed with the caption, "My poor baby... I cannot remember the last time he was so sick."
Mahone, who hails from San Antonio, Texas, recently signed to Cash Money Records to work on his debut album. He was the winner of the "Artist to Watch" award at the MTV Video Music Awards in August.